Question

Which sentence contains an inappropriate shift in tense? A. Lauren laughed out loud after she listens to joke. B. As the children play, Jonah is happy to relax with a book. C. Sometimes the dog runs around and chases its own tail.

Answer 1

A. Lauren laughed out loud after she listens to joke.

If this was written correctly, it would say:

Lauren laughed out loud after she listened to the joke.

Answer 2

The only sentence which has inappropriate shift in tense is A) Lauren laughed out loud after she listens to joke.
It should be listened, in the past, not listens, in the present.