Based on this excerpt, I would say the answer is false because the text states that transmissible cancers were not found in Tasmanian devil prior to 1996 as evidenced "before 1996, no one had observed them in Tasmanian devils". Hope that helps!

I would suggest to read as much as you can in English, ensure you are reading different materials (books, articles, reports etc). Try different forms of English writing (informal, creative, business, academic), and then seek feedback on it. I hope that helps!

I’m from Argentina, and in my culture we’re very sociable, affectionate and we also drink mate.