Which sentence uses capitalization rules correctly?

A. My great-grandma finally got internet access because she wanted to email my brother when he went to College.
B. My great-grandma finally got Internet access because she wanted to email my brother when he went to college.
C. My great-grandma finally got Internet access because she wanted to Email my brother when he went to college.
D. My great-grandma finally got Internet access because she wanted to Email my Brother when he went to College.