Need help asap plz i give brailest What is the best way to expand the sentences in the box?

Mark is an officer. He helps people.

A.

Mark is a police officer in Los Angeles. And he helps people.

B.

Mark is an officer. He helps many, many people stay safe from lots and lots of harm.

C.

Mark is a police officer. He helps people.

D.

Mark is a police officer in Los Angeles. He helps keep people safe from harm.