问题详情

Speaker A: Hi. My name is Mark. I"m from Houston, Texas.
Speaker B: I"m Bill. Glad to meet you. What year are you？
Speaker A: ______
A．I was born in 1990
B．I"ve been here for years
C．I"m 19 years old
D．I"m a first-year student请帮忙给出正确答案和分析，谢谢！