If earth was not a connecting system then the heat from its interior wouldn’t have effect on the tectonic plate at all. The heat from the interior causes the tectonic plates to shift, which effects the oceans sea floor and does cause volcanos to be created.
Answer: I think it it is D because it is the most polite and shows that you understand that the other person feels differently.
Macbeth is completely and solely responsible for his own downfall. He lead himself to defeat by falling to his fatal flaws. Manipulation, ambition, and power got the better of him creating great inner turmoil, and bringing him to an abrupt end. From the beginning Macbeth was able to choose his own fate.
I think it would be D, but don’t take my word for it.