I saw a woman running towards me in the dark. Before I could recognize who she was, she had run back in the direction ________ she had come.

A．of which

B．by which

C．in which

D．from which

只要具备了错觉产生的条件，（）。

A.错觉就必然会产生

B.若不知道错觉产生的原因也无法消除错觉

C.若知道了错觉产生的原因，就可以通过主观努力来消除错觉

D.有些错觉能通过主观努力加以消除，有些则不能