Answer:
It would be answer choice number 3 or C (Injured shoulders and upper and lower back)
Explanation:
This would be correct because bending at the waist and picking up large or heavy objects interferes with your spine and your shoulders. Regularly lifting this will give you problems in the future.
Most likely your body won't be as harmed the 2nd time due to the preparation of your cells.
Progressively Overloading his muscles, assuming he is doing weight training, to increase strength over time. he should not stay with the same weight for two months, unless he can perform more reps with better form over time.