Which of the Following Is correct

Which of the following is correct?

A) the most severe weather in a hurricane occurs in the spiral bands.
B) by definition,hurricanes have sustained winds that exceed 65 knots (119 km?h?¹) .
C) mature hurricanes develop a central eye of stormy conditions (in which it is often possible to see the sky) that is surrounded by a swirling eyewall.
D) only about 35 percent of tropical disturbances intensify into a full-fledged hurricane or typhoon.
E) hurricanes never move over central Canada.