Two glass bulbs each having a volume of exactly 1L are connected by a valve. The left bulb contains a sample of nitrogen gas at a pressure of 101.325 kPa (kiloPascal), the right bulb has been emptied of gas and the pressure in the right bulb is 0 kPa. (Use photo)

Which statement provides the BEST explanation for what happens when the valve between the bulbs is opened?

A
The volume available for the gas will double. Doubling the volume will cause the pressure and temperature to decrease.
B
The volume available for the gas will double. Doubling the volume will increases the amount of gas to keep the pressure constant.
C
The gas will expand into the empty bulb. Expansion of the gas will increase the gas pressure and decrease the gas temperature.
D
The gas will expand into the empty bulb. Expansion of the gas will increase the gas pressure and increase the gas temperature.