PLZ HELP ME

In which sentence does the introductory word to the noun clause function as an adverb

A: She could not decide which Scandinavian flag was her favorite.

B: I don't know when the flagpole was painted.

C: Whatever my supervisor advised, I did.

D: The historian said the flag was 200 uears old

Question

PLZ HELP ME 


In which sentence does the introductory word to the noun clause function as an adverb 

A: She could not decide which Scandinavian flag was her favorite.

B: I don't know when the flagpole was painted.

C: Whatever my supervisor advised, I did.

D: The historian said the flag was 200 uears old

rose21 · Answer

C: Whatever my supervisor advised, I did.

commas are placed after introductory words.
C is the only one with a comma