Answer :
From this passage you can take away a lot of things. But the one that stands out the most is exactly what the narrator wants to seem. The answer is A). In this case, the strongest inference is that the narrator wishes to turn back before Fortunato gets sick
I took the test.
A.) is incorrect.
D.) is incorrect.
C.) I can't see how that could be the answer
So, B.) seems like the most reasonable answer.