Read the sentence.

That bird has a very large wingspan. THAT IS BOLD

Which answer describes the word in bold?
A.
The word “that” is an adjective that tells which one.

B.
The word “that” is an adverb that tells to what extent.

C.
The word “that” is an adverb that tells where.

D.
The word “that” is an adjective that tells what kind.