Which of the followings are about marketing ethics issue？

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