Learning curves are used for a variety of purposes. These include:
O internal, external, strategic
O infrastructure, external, strategic
O internal, tactical, strategic
O internal, external, shareholders

The correct answer is letter "A": internal, external, strategic.

Explanation:

Learning curves refers to the process people go through when they engage in a new activity and their progress as they keep repeating the same activity constantly. In the workplace, learning curves are useful for three main purposes:  

answer; standing committee;

answerpublish a notice of the proposed rulemaking proceeding in the federal register;