What type of exploit has Harold inserted into the online game?

Harold is a software application developer for 24/7 Gaming Incorporated, anonline gaming company that hosts over 25 online game environments. Harold has worked at the company for over 8 years and has risen up through the ranks. One day, Harold comes in to work and is informed that his position is being terminated in two weeks for budget reasons. Harold is furious because of all the time and effort he has invested in the company. Harold decides to get revenge so he implants some hacks into the code of one online game the company hosts. He tellshis friends how to access the code; which lets them see through walls and otherobjects within the game while other players cannot. What type of exploit has Harold inserted into the online game?

A.
Harold has created a Wall Hack to allow his friends to see through walls and objects in the game.

B.
He has inserted an Aimbot hack into the game giving his friends an unfair advantage over other players.

C.
Harold has hacked the online game by inserting a Cham hack into the environment.

D.
This type of code exploit is called Strafe-jumping.