某学校的研究性学习小组以“研究××遗传病的遗传方式”为课题进行调查研究，最好选择调查何种遗传病以及采用的方法是[ ]

A．白化病；在周围熟悉的4～10个家系调查

B．红绿色盲；在患者家系中调查

C．苯丙酮尿症；在学校内随机抽样调查

D．青少年型糖尿病；在患者家系中调查

Speaker A: Hey, why don’t we go out and do something tonight I feel kind of bored.
Speaker B: ().

A. You shouldn’t feel bored with so many assignments to finish.

B. Would you like to go dancing with me

C. Sometimes I also feel bored staying at home all day.

D. I wish I could. But I really have to stay in and write to my parents.