Requirements for a Hurricane to Develop Include All but Which $\circ$

Requirements for a hurricane to develop include all but which of the following?

A) seawater with a temperature of at least 80 ^$\circ$ F in the upper 200 ft of the ocean
B) air must be unstable,warm,and humid
C) weak upper-level winds,preferably blowing in the same direction the developing storm is moving
D) tornado serving as triggering mechanism,spreading out and slowing as storm grows