Important Requirements for Hail to Form Are _______________________________

Important requirements for hail to form are _______________________________.

A) large thunderstorms with buoyant hot air rising from heated ground
B) upper-level cold air creating maximum temperature contrasts
C) strong updrafts to keep hailstones suspended while adding coatings of ice onto ever-growing cores
D) All of these are correct.
E) None of these are correct.