What kind of complement is the underlined word?

the cat's claws are quite (sharp).

a. indirect object
b. predicate adjective
c. direct object
d. predicate nominative

Which is an example of a graphical source (apex) a. a book of poetry written by a well known speaker b. a nonfiction book about the economic consequences c. a chart that identifies the number of new homes d. a magazine article that reviews the latest books