According to Arnot, which is the most important type of exercise for being a strong climber?

The correct answer is B) cross training.

Cross training is considered the most important type of exercise for climbers because it helps develop overall strength, flexibility, and endurance, which are essential for climbing. It allows climbers to work on various muscle groups and improve their fitness level, making them stronger on the climbing wall. This type of training can include a mix of different exercises, which can prevent injury and enhance performance.

If you have more questions or need further explanations, feel free to ask!