<h2>A. following the rules and any expected etiquette.</h2>
Explanation:
This statement "respecting the spirit of the rules" refers to the proper behaviour, the proper etiquette or ethic code we should show, which is following the rules and their implications. So, the option "following the rules and any expected etiquette" also refers to that proper ethical code behaviour people should practice.
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.