Is this factory ( )you visited the other day

Is this factory ( )you visited the other day
A.that B.where C.in which D.the one
本句还是选 D.
the one 是本句的表语.
你把此句还原为陈述句；
this factory is the one (some foreign friends visited last friday)
括号内是定语从句,省略了that/which,因为在定语从句中做宾语.