Which option would be correct? #9

C.  what I say              (It's a noun clause.)

Explanation:

Almost 100% it is "what i say"

Explanation:

because an adverbial clause is a dependent clause that functions as an adverb. That is, the entire clause modifies a verb, an adjective, or another adverb. As with all clauses, it contains a subject and predicate, though the subject as well as the (predicate) verb may sometimes be omitted and implied (see below).

that’s a nice boss :