Vail Enterprises'stock price is ___ 16 percent since the start of the year, mostly because of an increase in its ovetseas revenuses.

(A) behind

(B) toward

(C) up

(D) around

저는 숫자강조부사 d번을 골랐는데 d번은 답이 안되는 이유를 알고 싶습니다.

After working for many years as a police officer, Paul Stone ____ his career experience to start up a personal security company for high-profile executives.

(A) kept after

(B)  follwed on

(C) pointed out

(D) drew on

해석과 답의 이유를 알고 싶습니다.