Which of these occurs when skin freezes and turns numb and grey? A. Heat cramps
B. Heat exhaustion
C. Frostbite
D. Hypothermia​

C. Frostbite

Explanation:

the secretary of state, appointed by the president with the advice and consent of the senate, is the president's chief foreign affairs adviser. the secretary carries out the president's foreign policies through the state department and the foreign service of the united states.