A young man who refused to give his name dived into the river yesterday morning to save a twelve-year-old boy. The boy was in danger in the river. He had been swimming in the river and caught his foot between two concrete posts under the bridge. He shouted out for help. At the time a young man was riding across the bridge on his bicycle. He quickly got down and dived into the river. He then freed the boy's foot and helped him to the river bank where a small crowd had collected. The boy thanked his rescuer sincerely, then ran off down the road. He was last seen climbing over a gate before disappearing over the top of the hill. The young man who was about 20 years of age said, "I don't blame the boy for not giving his name. Why should he? If he wants to swim in the river, that's his business. And if I want to help him, that's mine. You can not have my name either." He then ran back to the bridge, got his bicycle and rode away. The 12-year-old boy had his foot caught between two concrete posts in the river.
选项：

A:T
B:F