Which of the Following Best Explains How a Single Volcanic

Which of the following best explains how a single volcanic eruption in Hawaii can have an effect on the weather elsewhere in the world?

A) The ash thrown from the volcano enters Earth's atmosphere. Winds then carry it around the world, where it may interfere with the amount of sunlight that reaches Earth's surface.
B) The carbon dioxide and other greenhouse gasses released by the volcano cause global warming.
C) The humans that live in areas where volcanoes occur leave the area, thus changing the conditions in the areas to which they move.
D) The ash and lava combine to form a rain shadow, which is capable of affecting the weather great distances away.