Answer:
B. There is a drop in temperature
C. increases when pressure decreases
Step-by-step explanation:
With constant pressure, the volume is proportional to the temperature. Since the temperature is directly related to the average kinetic energy of the gas molecules. So, the lower the volume (compression), the lower the speed of the molecules (temperature).
On the other hand. With constant temperature, when the pressure increases, the volume drops, while if the pressure decreases the volume increases.