Which of the Following Is an Example of a Compound

Multiple Choice

Which of the following is an example of a compound sentence?

A) Amir was awarded employee of the month.
B) Sosuke is transferring to the new office.
C) When the summer holidays are over, the house will be empty.
D) Because he has a good credit record with us, we will approve his loan.
E) Frankie was in line for a promotion, but he did not get it.