Which of the following are disadvantages of personal selling over other promotional activities？

Which of the following are disadvantages of personal selling over other promotional activities？
A.Personal selling is time-consuming.
B.Personal selling is relatively expensive.
C.The marketing message can be tailored to suit the potential buyer'；s needs.
D.Personal selling has a more limited reach.
正确答案：Personal selling is time-consuming.；The marketing message can be tailored to suit the potential buyer'；s needs.；Personal selling has a more limited reach.