The social networking site is specially designed for our employees and,

with the _____ of some periodic  ads, it is working fine

(A) solution
(B) repetition
(C) prohibition
(D) exception

____안에 들어갈 것은 무엇인가요? 

문맥상 무슨 단어가 제일 적합할지 궁금합니다...

아시는분 댓글좀 달아주세요~