The intensity which is most closely associated with the training adaptation of muscle hypertrophy is 67 to 85 percent of 1RM and is denoted as option B.
This type of muscle growth is observed in the enlargement of its overall size and volume as a result of various forms of stimuli such as external force from different types of load etc.
When performing exercises, load is carried by the muscles which increases its tendency to expand due to the stimulation of more structural proteins to the area as a result of it being stretched. This is however optimal when the individual attains about 67 to 85 percent of one-rep max when performing physical activities.
This is therefore the reason why option B was chosen as the most appropriate choice.
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