Answer:
O The ability to play the piano is influenced by genetics as well as the environment.
Step-by-step explanation:
Since Joyce and Tim both started lessons at the same time, and practice the same amount these factors do not explain why Joyce is better than Tim. That means that C cannot be correct. Next D and A cannot be correct since they don't state anything that could explain why Joyce is better than Tim, they only say random facts about piano playing that could be true.