Tom and Rey Both Own Supermarkets

Multiple Choice

Tom and Rey both own supermarkets.One of the products that they sell in their supermarkets is milk.Which of the following is an example of a primary boycott?

A) Tom and Rey agree to both buy milk from Brown Cow Farm.
B) Tom and Rey agree to both stop buying milk from Black and White Cow Farm.
C) Tom and Rey agree to both stop buying milk because of mad cow disease.
D) Tom and Rey agree to both stop drinking milk.