Select the correct answer. Which best summarizes these paragraphs? A. Dr. Percy Spencer placed popcorn kernels near a magnetron and turned it on. The popcorn jumped and popped into the air and all over the floor. B. A scientist named Dr. Percy Spencer tried different experiments using a magnetron, and he discovered that it would pop popcorn. C. Dr. Percy Spencer was a curious man who, in 1946, invented the magnetron. D. Dr. Percy Spencer invented the microwave oven after he discovered that a magnetron could heat food.