The answer would be c, judgement.
The answer that sounds most correct would be: B) Open back and sufficient tread.
I personally think narrow hand placements are harder for push ups than the wide medium hand placements for push ups. I think that both of the different hand placements uses different muscles, which may be why I feel that the narrow hand placement is harder. Hope I helped!
The Answer to the question
A. Nitrogen
I think the answer is muscles, but I'm not sure
Hope this helps... mark as Brainliest plz
