How should the sentence read?

Question

What should go in the parentheses or do no corrections need to be made?


The students learned to read and write (for which) they learned from the teacher.

a.) no correction
b.) of that
c.) which
d.) for that

The sentence should have no commas in it.
This was from a test and the answer "which" did not have a comma in front of it......

or
e.) from that

Answer 1

c) is correct

Answer 2

c

Answer 3

I hate these, I think its "C"

Answer 4

d.) for that