Bella got up at 8:10. It took 10 minutes to wash and 30 minutes to eat breakfast. At this moment, she began to read. After reading, she went out. She went out at 9:45. How long did she read? 
选项为:A:$$10$$ minutes  B:$$15$$ minutes  C:$$20$$ minutes  D:$$25$$ minutes  E:$$30$$ minutes  请回答其中一个选项.