Dr. Percy Spencer invented the microwave oven in 1946. The idea came to him when a chocolate candy bar melted in his pocket. Dr. Spencer had been testing something called a magnetron, which uses microwaves. When working next to the magnetron, the microwaves caused the candy bar in his pocket to heat up and then melt very quickly. His pocket, however, was not hot. His clothes were not burned. Dr. Spencer grew curious and decided to try heating something else. It was popcorn. He placed popcorn kernels near the magnetron and turned it on. The popcorn jumped and popped into the air and all over the floor.

Select the correct answer.
Which best summarizes these paragraphs?
A.
Dr. Percy Spencer was a curious man who, in 1946, invented the magnetron.
B.
Dr. Percy Spencer invented the microwave oven after he discovered that a magnetron could heat food.
C.
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.
D.
A scientist named Dr. Percy Spencer tried different experiments using a magnetron, and he discovered that it would pop popcorn.