I'm taking a test and have to guess the right answer to the question after the article. Article: When Mencius was a little boy, his father died. Mencius and his mother were quite poor. One day Mencius returned home from school and found his mother making some cloth. It was very beautiful and expensive. "How much of the book have you read today?" Mencius' mother asked him. "I haven't read any of it yet." Mencius replied, "I played with some friends of mine in the fields." When his mother heard this, she picked up a pair of scissors and cut the cloth. "Why did you cut your cloth?" Mencius asked, "It was beautiful but now you've wasted it." "You have wasted your time," his mother said, "now I have wasted mine. Look what terrible things we have done." Mencius learnt a lot from this lesson. After that, he always studied hard. ,. Question: How did Mencius' mother feel when she knew Mencius haven't read any book? Options: A: She felt very happy. B: She felt very sad. C: She felt very excited. D: She felt very pleased.
A:
B