The best combination for creating an effective exercise program for variety, sustainability, and overall fitness is C. Cardio and strength training activities.
Combining cardio and strength training can provide a balanced approach that improves cardiovascular fitness, builds muscle, enhances metabolism, and supports overall health. Additionally, engaging in both types of exercise can help prevent boredom and keep workouts interesting by varying the focus and intensity of sessions.
While the other options offer valuable elements, they are more specialized and may not provide the comprehensive benefits that come from integrating both cardio and strength training.