Read the article and select the best answer. Article: Mr Smith made many tests with different animals and the monkey was the cleverest of all the animals. One day Mr Smith put a monkey in a room. He also put some small boxes in it. In one of the boxes there was some food. "How long will it take the monkey to find the food? " Mr Smith said to himself. " Let me wait and see. " He left the room and waited outside. Three minutes later, he put his eye to the keyhole . What did he see? He saw the eye of the monkey. The monkey was on the other side of the door and looked at Mr Smith through the keyhole. Question: Mr Smith is a _ . Options: A: teacher B: scientist C: doctor D: farm worker
Answer:
B