A. perplex
B. disarm
C. delude
D. release
E. fortify
I bait you when I deliberately set out to annoy you. If I'm successful, you'll look at me in a negative light.
1. When I perplex you (intentionally or not), you may be annoyed. Not A.
2. When I disarm you, I set out to make you look on me (or my recommendation) in a positive light. Possibly B.
3. When I delude you, you will be annoyed if you find out. Not C.
4. When I release you, you will be pleased. But 'release' suggests prior physical restraint, whereas 'bait' is psychological. Not D.
5. When I fortify you, I build up your confidence with encouraging words. Not E.
So I would say B. It's not an entirely perfect antonym, though: baiting can describe the deliberately annoying action itself, whereas disarming is the consequence of the deliberately pleasing action.
MrP