When rowing for exercise, the stabilizer muscles that support and stabilize the movement primarily include muscles in the core and back. Among the options provided, the most relevant answer would be:
D. back
The back muscles play a significant role in maintaining posture and stability during the rowing motion. While the biceps and triceps are involved in the pulling and pushing actions of rowing, and the cardiac muscles are responsible for heart contractions, the back muscles are crucial for stabilizing the entire upper body during the exercise.