QUES:
Who is they in the following sentence?

Entertainmart has to win over the consumers with their low prices because they are the ones that contribute to making a business successful.

ANS:
the consumers


QUES:
Who is him in the following sentence?

Hill joined Obama because Bill trusted him.

ANS:
Obama


QUES:
Who is they in the following sentence?

The teachers failed the students because they graded the test incorrectly.

ANS:

The teachers