in an endurance mesocycle of a beginner's program, which rep and set scheme would be most appropriate?

People targeting muscular endurance will aim for a range from 12 to 20+ reps. Obviously you won't be able to lift heavy amounts of weight for 20+ reps, so you'll be lifting lighter loads. Also, because you're targeting endurance improvements, you want to decrease the amount of rest between sets: 30 seconds to a minute.

Explanation:

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absolute strength refers to the maximum force exerted by a body irrespective of body size. relative strength on the other hand is the force exerted by a body in relation to muscle size or body weight.

so the answer is: c. absolute strength measures strength regardless of your body size, while relative strength measures strength adjusted for your weight.