单项选择题

Which of the following italicized phrase is used as the SUBJECT of the sentence

A. She was persuaded by her father to pursue a singing career in London.
B. We opted to promote the band at a local level, and not nationally.
C. It was vital to restore one’s faith in a game which is allegedly losing its way.
D. Tommy disappeared, only to return an hour later smelling like a manure heap.