my uncle came back from Yantai()

问题描述:

my uncle came back from Yantai()
My uncle came back from Yantai ___ my car,not __ bus.
A.by,by B.in,in C.by,in D.in,by

by,by A
乘坐什么交通工具用介词 by
或者说通过什么方式用介词by.