--Are you going somewhere during the winter vacation?

--Yes, I’ve found a nice beach ________ I can enjoy swimming even in February．

A．that

B．when

C．where

D．which

已知：如图AABC是等腰三角形，AB＝AC，P是BC上的任意一点，PE⊥AC,PD⊥AB,BF⊥AC，则PE+PD的长度之和与BF的长度关系为（）

A．PE+PD＝BF

B．PE+PD＞BF

C．PE+PD＜BF

D．不确定