Question

A verb which mean to think about the past B verb which mean to return or to return something Sam phoned while you were out. Can you RING her BACK?

Answer 1

A. Think back
B. Return back

Answer 2

A verb that means to think about the past is "reflect."

A verb that means to return or to return something is "return" or "give back." So in the context of the sentence, the correct option would be:

"Sam phoned while you were out. Can you RING her BACK?"