Cost savings that the firm accrues when it successfully shares some of its resources and activities or some of its core competencies between its businesses are called:
a. core economies.
b. economies of scope.
c. economies of competence.
d. economies of scale.

b. economies of scope.

Explanation:

Based on the information being provided within the question it can be said that this type of situation is known as economies of scope. This is basically the savings that are gained by a company from producing two or more different goods using shared resources. Which would cost them a lot more if they were produced separately.

answer; i believe the correct answer is (a) purchase of treasury stock;