The following statement represents what type of delusion?

"Brad is my nemisis. He works over in the IT department and has set up my computer so that it always crashes the moment I try and save my work. As soon as I hit the "save" icon in any program, my computer crashes. I've set up a hidden camera to try and catch him messing with my computer, but he must be doing it remotely because the camera hasn't picked up anything. I know it is him because the other day he said, "hi" to me as he walked past my office... but he said it with a look on his face. He just doesn't want me to get promoted."

A. Grandiose

B. Persecutory

C. Jealous

D. Mixed