Answer:
b. by 2-10% increased
Step-by-step explanation:
When we talk about gym training, whether it's simple weight training or some specific strength training, a lot of people think more about the load and the amount of repetitions than the perfect execution of the movement. It can be risky, especially if you have never done the exercise before. In any exercise of your workout, keep in mind that you first need to learn the correct movement. Then execute it with mastery, only then increase the load and repetitions. And, if you did or do without coaching guidance, there is a great chance you are doing it wrong.
Thinking about this, if your client can successfully complete two or more repetitions above the desired repetition range in the last set in two consecutive workouts for any given exercise, the load should be by 2-10% increased, depending on your client's current physical abilities.