She sat all alone in the party bearing that sulky face.

Answer: Option D

Sulky : morose, bad-tempered, and resentful; refusing to be cooperative or cheerful.
Kind : a group of people or things having similar characteristics.
Loving : feeling or showing love or great care.
Mild : not severe, serious, or harsh.
Cheerful : noticeably happy and optimistic.

Antonym of Sulky is Cheerful