如图，将三角形ABC沿水平方向向右平移到三角形DEF的位置，已知点A，D之间的距离为2，CE=4，则BF的长（　　）

A．4

B．6

C．8

D．10

Mr.Black is very happy because the clothes made in his factory have never been________.

A．popular

B．more popular

C．most popular

D．the most popular