Question

Please help me I think its C


Choose the sentence that is written correctly.
A. When students study in groups for they have an opportunity to teach their classmates something that they know.
B. When students study in groups, for they have an opportunity to teach their classmates something that they know.
C. When students study in groups; they have an opportunity to teach their classmates something that they know.
D. When students study in groups, they have an opportunity to teach their classmates something that they know.

Answer 1

It's not C. There should be a comma where the semi colon is