In the below sentence, what type of adjective or adverb is more happily?

At the party, Michael danced more happily than I had seen him dance before.

A. Comparative adjective
B. comparative adverb
C. superlative adjective
D. superlative adverb

i have never studied these adjectives/adverbs before in class...

1 answer

http://www.chompchomp.com/terms/adverb.htm

Scroll down and read about Comparative and Superlative adverbs.