这个英语题为什么选C不选A

问题描述:

这个英语题为什么选C不选A
When the cooking class changed to Tuesdays,I had to ( )so that I could ( )my daughter from her piano lessons.
A drop in ;pick out
B drop off;pick up
C drop out;pick up
D drop by;pick out

Drop in 顺便拜访 如
Do drop in if you happen to be passing!
如果你碰巧经过时进来坐坐.
Drop out 离开,退出 如
He says he has dropped out,and won't attend college any more.
他说他退了学,以后也不会去上大学了.
Pick out 取出,去掉 如
The child refuses to eat this fruit without first picking out the stones.不把果核取出来,那个小孩就不会吃这水果.
pick up 安排接取
题中是说cooking class 改到了星期二,所以我要退出,以便于去接送我的女儿
选C