John's 8-Year-Old Chevrolet Trail Blazer Requires Repairs Estimated at $10,000

John's 8-year-old Chevrolet Trail Blazer requires repairs estimated at $10,000 to make it road worthy again. His wife, Sherry, suggested that he should buy a 5-year-old used Jeep Grand Cherokee instead for $10,000 cash. Sherry estimated the following costs for the two cars:

The cost NOT relevant for this decision is the ________.

A) acquisition cost of the Trail Blazer
B) acquisition cost of the Grand Cherokee
C) repairs to the Trail Blazer
D) annual operating costs of the Grand Cherokee