Question:
Paul made fun of Henry since he knew everyone else did.

he
Answer:
Paul
Question:
The NSA sent their agents in the field to retrieve intelligence because they need people in the field to do the field work.

they
Answer:
The NSA
Question:
The forensic team managed to link the criminals to the crime since they analyzed the blood samples at the crime scene.

they
Answer:
The forensic team
Question:
Henry changed Jack's oil, because he gave him money.

he
Answer:

Jack