30. gymnasts must do all of the following on the still rings except:
o a keep arms straight
ob perform at least one move while holding only one ring
o c perform holds and handstands
od keep the cables from swinging

yes you do or he will not stop with that

they cheat and apolgize adn they do it again

out of the choices i'd say d the ability to set goals, mainly because to desire to continue you need motivation but it isn't motivation in that part, but setting goals means you have an endgame and you want to reach it which sums up motivation.

your answer will be c. sorry if im wrong: )