Which sentence contains an adverb modifying an adjective?(1 point)

Responses

Unfortunately, it began to rain.
Unfortunately, it began to rain.

Slowly, the sleepy pig rolled over.
Slowly, the sleepy pig rolled over.

The very content cow chewed cud.
The very content cow chewed cud.

The barn cat purred happily.

The barn cat purred happily.

The sentence "The barn cat purred happily" contains an adverb ("happily") modifying an adjective ("purred").