Billy's disability prevented him from moving, but it didn't alter his mind or what?\nOptions:\n- activity\n- potence\n- qualification\n- competency\n- strength
Let's think carefully first. Step-by-step reasoning process:
User
Competency is the ability to do something successfully or efficiently. Billy's disability prevented him from moving, but it didn't alter his mind or competency. So the final answer is competency.
Assistant