函数f(x)=x²+mx+1的图象关于直线x=1对称的条件是[ ]

A．m=-2

B．m=2

C．m=-1

D．m=1

—Excuse me. Could you tell me _______?

—Yes, There is a video shop next to the tall building. [ ]

A. where can I buy some CDs

B. where I can buy some CDs

C. when can I buy some CDs

D. when I can buy some CDs