To add aerobic exercise to her workout routine, the best option for Carmille would be jumping rope. Jumping rope is a high-intensity aerobic exercise that effectively increases heart rate and improves cardiovascular fitness.
While kickboxing also provides an aerobic workout, it may also have elements of strength and skill. Weightlifting primarily focuses on strength and muscle building and is not considered aerobic exercise. Sprinting is typically a form of anaerobic exercise, although it can be part of an interval training program that includes aerobic components.
Therefore, jumping rope would most accurately help her reach her aerobic exercise goal.