Which sentence is a compound sentence? A. Mom opened the oven, and fragrant smells immediately began to fill the room. B. Without warning, a car alarm began to blare. C. The little boat rocked and swayed on the water until the waves calmed down. D. Until dinner was ready, we were told to stay away from the kitchen.
"A. Mom opened the oven, and fragrant smells immediately began to fill the room" is a compound sentence because it combines two, full independent clauses that can be written on their own.