Firstly, this isn't a complete sentence. It should be something like: As there were no technical data available, we managed to ...... them. The word 'ready' doesn't seem necessary. Secondly, there isn't really an answer. I would guess that whoever wrote this intended the answer to be D (go without), but this is not a very natural use of this phrasal verb.In my view, the missing phrasal verb is 'do without'.

Hi Omar, Sorry, this is not a natural sentence. It's clearly written by a non-native speaker, and I can only find it on China-based websites. I suggest looking at English-learning websites based in English-speaking countries. I agree that the answer is supposed to be D, but it's not a good example for this phrasal verb.

Yes, I think it is "D", but the sentence could be natural. We might consider "being" as understood in the introductory phrase. "No ready technical data (being) available, we managed to go without them."