According to the Automotive Recyclers Association (ARA) grading standards for mechanical parts, which of the following engines would be considered 'A' grade?
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A
A 4-year-old engine with 70,000 miles.
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B
A 2-year-old engine with 65,000 miles.
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C
An 8-year-old engine with 55,000 miles.
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D
A 5-year-old engine with 80,000 miles.