Why is A incorrect and how is C the answer to this question?

Danny went for a long bike ride he covered at least forty miles

How will charlie most likely change after his experience at the diner in part 2 of "flowers for algernon"? he should be kind to each person who crosses his path. he will be more sympathetic to those who are similar to the way he once was. he will attempt to the dishwasher receive the surgery he was given. he will react the same way each time he sees someone being treated unfairly.

Isaw my future flash before me and it did not take me anytime to slow down. i need to replace the words "it did".