Choose the best answer to each of the following questions according to what is sated or implied in Text A. By using the example of Trunk Club, the author wants to tell the fact that.
A.
once done properly, email marketing can generate a lot of returns in running an app of a website
B.
email marketing plays such a great role that relevant apps and websites come after it
C.
individual user behavior is the most important thing that we should pay attention to
D.
without email, mobile apps and relevant websites are likely to suffer from a shortage in repeat traffic