Which of the followings are about marketing ethics issue？

A.Failing to inform consumers of known potential risks of using a product

B.A salesperson exaggerating the benefits of a product to persuade a customer to purchase it

C.Advertising junk food on children's television

D.Increasing the price of a product due to increased customer demand and limited availability

正确答案：Failing to inform consumers of known potential risks of using a product；A salesperson exaggerating the benefits of a product to persuade a customer to purchase it；Advertising junk food on children's television