Question

Which sentence contains an unnecessary shift in tense?

A- If anyone knows the answer, she does.
B- As I came in the front door, Eddie is going out the back door.
C- A row of ants had filed up the chair leg and was about to consume our lunch.
D- The barrier will drop down every time the train approaches the crossing.

Answer 1

C. Because, the ants haven't consume the food yet, so it shouldn't be in the past tense 'was'

Answer 2

It would be answer b because the sentence does not make sense