I think the most grammatically correct answer is actually B. Correct me if I am wrong.
That i was to late when he got there , the guy had already forgotten who he was .
You write the answer like this 430,825
The answer is D, bc when you flashback, you go back in time to when something happened
14 is water and although I made sure to look at the passage I knew that it was water anyway because water is not considered to be a living organism but it contains many different living organisms.
15 would be D
16 would be A
17 I am not entirely sure but I believe it is C
18 would be A
19 I am not entirely sure but I believe It is B
20 I would believe would be D
I hope I helped!