The patient looks a little more cheerful this morning.

Answer: Option A

Cheerful : noticeably happy and optimistic.
Depressed : (of a person) in a state of unhappiness or despondency.
Dull : lacking interest or excitement.
Energetic : showing or involving great activity or vitality.
Stupid : having or showing a great lack of intelligence or common sense.

Antonym of Cheerful is Depressed