Read the passage: 'Physical fitness standards in the military are designed to ensure that service members can perform their duties effectively under demanding conditions. All personnel must pass a fitness assessment twice per year, which includes timed running, push-ups, and sit-ups. Those who fail any portion of the test are placed on a remedial fitness program and must retest within 90 days.' How often must military personnel take a fitness assessment?
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A
Once per year
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B
Twice per year
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C
Every 90 days
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D
Once per month