Answer:
D. both B. and C
Step-by-step explanation:
From the ideal gas law we have

Where,
p = Pressure
V = Volume
R = Gas constant
T = Temperature
n = Number of moles
Here, it can be seen that if the volume of the container decreases then the pressure will increase.
If the volume of the gas increases without changing the dimensions of the container then the pressure will increase. More amount of gas in the same volume will increase pressure.