an announcer on a new york radio station (b)[that / what] stayed on the air because it had auxiliary power reported, an interesting drama is being unfolded on our streets. the price of candles in many stores (c)[has / have] doubled. on the other hand, some good-hearted merchants are offering their candles at half price, or even giving them away.첫번째 줄 문장의 주어 동사는 누구인가요?
그리고 (b)의답이 that이 되는이유는 왜 인가요?