A System Is Said to Go Through an Adiabatic Process

Multiple Choice

A system is said to go through an adiabatic process if,throughout the process,

A) it maintains a constant ratio of pressure to temperature.
B) it remains at a constant temperature.
C) it loses no heat to its surroundings and gains none from them.
D) its total energy increases.
E) it does no work on its surroundings.