Endorphins and testosterone refers to the hormones which are responsible for the building of muscles and reduction of stress in individuals.
This is also referred to as a happy hormone which is released by the body when it is stressed or pain is felt to ease the effect.
It is usually released during exercises with the testosterone ensuring that muscles are built through adequate increase in its mass which is therefore the reason why option D was chosen as the most appropriate choice in this type of scenario.
Read more about Endorphins here https://brainly.com/question/1361910
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