关于胚胎分割的叙述，正确的是[ ]

A．可以将胚胎任意分割成多块

B．胚胎分割是一种有性生殖

C．胚胎分割后，移植获得的后代基因型完全相同

D．胚胎分割可以看做是克隆

After a short rest, he came back to_______ he had stopped and continued reading.

A．where

B．which

C．in which

D．that