Answer:
The answer is A.
Anthony's flight arrived at eight, but the cab driver forgot to pick him up.
Explanation:
If anthonys flight will arrive at eight, how will you know the cab driver forgets to pick him up? Can you predict the future? It is a because it is past tense. "Arrived" not "Arrives." Arrives is future tense. So the answer is A.
(and I may or may not have already taken the test)