Final answer:
Stacy is likely focusing on building strength, endurance, and flexibility, while also incorporating relaxation and meditation through her yoga exercises.
Step-by-step explanation:
The question asks what Stacy is most likely focusing on by going to yoga class three times a week. Among the options provided, the correct answer is C) both of the above, meaning Stacy is most likely focusing on building strength, endurance, and flexibility through her yoga exercises. Yoga is known to be a flexibility exercise, which stretches and lengthens muscles, thereby increasing the range of motion and reducing risk of injury. Additionally, yoga often incorporates aspects of relaxation and meditation, which can help with stress reduction and mental well-being. Therefore, the comprehensive benefits of yoga address both physical and mental aspects of health.