Thermal paste is used between the CPU and heatsink to:
A.
make the heatsink easier to remove when replacing the CPU.
B.
aid in the transfer of energy from the CPU to the heatsink.
C.
act as a fire retardant should the CPU overheat.
D.
keep the heatsink in place on the CPU.
B. aid in the transfer of energy from the CPU to the heatsink