This way of learning gives him a chance to discuss with his classmates, ______ may have original ideas on the topic.
A. who
They are doing a lot of projects _______ help them understand the lessons better.
C. that
That way of studying, _______ gives them more control over their own learning, is quite useful.
B. which
Nick is watching the video _______ his geography teacher uploaded on Eclass.
B. that