What is the best way to rewrite the sentences to make one compound-complex sentence?

Katie then kept mowing down the opposition. When the last batter was fanned, the crowd erupted

Question

What is the best way to rewrite the sentences to make one compound-complex sentence?

Katie then kept mowing down the opposition. When the last batter was fanned, the crowd erupted

confusionist · Answer

A. 	 Katie then kept mowing down the opposition, when the last batter was fanned, the crowd erupted.
	B. 	 Katie then kept mowing down the opposition, and when the last batter was fanned, the crowd erupted. 
	C. 	 Katie then kept mowing down the opposition—when the last batter was fanned, and the crowd erupted.   
	D. 	 Katie then kept mowing down the opposition; and when the last batter was fanned, the crowd erupted.