Keen Ear Is Going to Begin Manufacturing Cellular Phones

Keen Ear is going to begin manufacturing cellular phones. The company decides to use just two different suppliers for its power cables. Which reason best describes the company's rationale for making that decision?

A) ability to eliminate their inventory control system
B) greater reliability in receiving the product
C) enhance Gantt chart effectiveness
D) simplify the management of their product and process layouts
E) ability to easily utilize a backup supplier if needed