In order to provide a safe workout environment, an individual should check
a. the condition and location of the gym equipment and temperature and ventilation in the room
b. his or her strength and flexibility before planning a routine
c. his or her goals and abilities before planning the workout routine
d. the time, frequency, and types of exercises and equipment that he or she prefers

a. the condition and location of the gym equipment and temperature and ventilation in the room

Explanation:

Safe workout environment involves several things, from the potential hazards in the ground, the laying of the weights and the equipment and how well vented the space is, he should check for the temperature also, too hot temperatures and too cold temperatures could work on the detriment of the routine, and it need to have a good air flow in order to keep the space ventilated.

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