The best answer is being combative ;)
Answer:
choice a
Explanation:it would make sense if you say he dinosaurs have gone extinct, but we still don know the reason for their extinction. hope this helped. have a nice day!!
The best thing you could do is read the book, or if in a hurry watch the Anne Frank movie on Netflix, or you can do research on the different side characters like Mr. or Mrs. Van Daan, Mr. and Mrs. Frank, or her sister.
I think that the answer is B. Brackets can indicate a change in verb tense
