I think the third one is correct, because prefer is used for something about the present time or future. The correct pattern is " 'd rather do something" or " 'd rather that someone do something".

Therefore, my answer is:
I'd rather that you explained it to her.

Hi everyone! It is my first note on italki.
I will try to write without translating anything and looking for correct grammar.
My name is Wisner, I am from Brazil. I am thirty one years old.
I studied English in the past, but I am a beginner yet.
I want to learn English to watch movies, series, shows and play games without subtitles.
I hope to improve my English here, I need your help to do this.
I want to help <strike>an</strike>other people <strike>to</strike> that learn Portuguese, too.
Thank you for reading my note! Bye.

Hi Wisner,
I think you're quite good for a beginner. Keep practising and you will get more fluent, step by step.
Good luck.

Probably his father or mother pushed him into the pool, because they want him to get the rewards. But obviously the man has different priorities than his parents. I think he believes that love is more important than money or fake relationships.
If I was the man, I would get the 1 million dollars reward ;)

I work in sales. I’m a team leader. Sales is for ambitious <strike>persons</strike> people who want to work<strike>ing</strike> for result and who have a certain purpose. We’re not here to fool around. It’s a sort of competition, you know? It can put you out of order. Some clients which you will <strike>tell</strike> call by phone and which you will convince<strike>ing</strike> to buy our product will abuse you. You should have the audacity for calling people by phone everyday and <strike style="background-color: rgb(255, 255, 255);">will</strike> should continue the challenge which you got from your first working day. Your goals have to be particular and you should <strike>to to </strike>demand <strike>that</strike> clients to make a decision about buying. You have to find a special approach for <strike>either</strike> each client. So your result is your responsibility. You <strike>have to</strike> should never give up. However it makes you extremely strong. One day you will realise that all of your fears <strike>is</strike> are behind and it turns out that your contribution is huge! Literally you will stay a fighter with objections, though it will not happen<strike>s</strike> <strike>not</strike> immediately. Perhaps, you might want to quit it as well one day. Just trust me, you <strike>have to</strike> should never give up, anyway. And <strike>everyday</strike> each day which you work in sales you <strike>use</strike> have to say: «I’m in!» It’s definitely most <strike>adventures</strike> adventurous way to stay the best version of yourself! I<strike>’ll</strike> bet you will admire it.

P. S. this text may seem<strike>s</strike> a bit strange but I just tried to use all the words that I have to learn :)

Your writing skills are not bad, but you should be more careful about some words.

Good luck!

Hi Alexander & Chris,

You're right it's called homonym, I just mixed them. I edited in the text but the title doesn't change. Thanks for your warning.

Both stories so far were very relevant, thanks for sharing.