What is the adverb in this sentence?

The cat swiftly caught the mouse under his paws.

Pick the adverb.

It is snowing outside, so we need to dress warmly.

Pick the adverb.

Michael completed his homework carefully.

Pick the adverb.

The phone rings constantly at the office.

Pick the adverb.

Pet the kitten softly if you want it to purr.

Pick the adverb.

Maria practices her piano regularly.

Pick the adverb.

The painter delicately adds the final touch to his art.

Pick the correct adverb.

Gina nervously twirls her hair.

Pick the adverb.

The cook gracefully spun the pizza dough in the air.

Pick the adverb.

The referee sternly looked at the players before blowing the whistle.

Pick the adverb.

She quietly sat in the library.

Pick the adverb.

He ran swiftly down the hill.

Pick the adverb.

She wrote her name very neatly.

Pick the adverb.

Jan sat sadly in the corner.

Pick the adverb.

Bridget jump suddenly out of her chair.

Pick the adverb.

The snow began to fall quickly.

Pick the adverb.

Isabella planted each flower carefully in her garden.

Pick the adverb.

She went immediately to the principal's office.

Pick the adverb.

It is raining heavily.