Please help I have searched this question and have not found it. I am bad at math and I'm taking a test and need answers so please help me

Juanita has completed typing 6 pages of her term paper. If her term paper is 18 pages long, how many more pages does she have to type?
A. 3 pages

B. 11 pages

C. 12 pages

D. 14 pages

Please select the best answer from the choices provided