Despite Its High Temperatures,why Would the Thermosphere Feel Cold to Humans

Despite its high temperatures,why would the thermosphere feel cold to humans?

A) The number of molecules is not high enough to transfer heat to human skin.
B) Humans would die due to pressure changes before they could experience the intense heat.
C) The atmosphere is denser in the thermosphere and this pressure reduces heat transfer.
D) The average kinetic energy is actually less in the thermosphere than the troposphere.