— I've read another book this week.

— Well, maybe _____ is not how much you read but what you read that counts. [ ]

A. this

B. that

C. there

D. it

如图所示，匀强电场方向竖直向上，匀强磁场方向水平指向纸外，有一电子（不计重力），恰能沿直线从左向右飞越此区域，则若电子以相同的速率从右向左水平飞入该区域，则电子将（　　）

A．沿直线飞越此区域

B．电子将向上偏转

C．电子将向下偏转

D．电子将向纸外偏转