Final answer:
To promote motor learning in clients trying a new exercise, the recommended method is to utilize low intensity and high repetitions, allowing for technique focus and neuromuscular adaptation.
Step-by-step explanation:
When a client is learning a new exercise and is struggling with proper execution, the focus should be on promoting motor learning which is best achieved with option B) With low intensity and high repetitions. This approach allows the client to practice the movement pattern without the added stress of heavy weights, which might lead to poor form and potential injury. Low intensity workouts enable clients to focus on technique, make necessary adjustments, and create neural adaptations. With high repetitions, the client's body has more opportunities to practice and reinforce the correct movement pattern. It's important to ensure proper rest between sets to prevent fatigue which can interfere with the learning process.