An equal mass of gas is enclosed in four identical cylinders by a piston that can move. The diagrams show the gas samples under different conditions of volume and temperature. Which list arranges the gas pressure from the smallest to the largest?
- A$1 \rightarrow 2 \rightarrow 3 \rightarrow 4$
- B$1 \rightarrow 3 \rightarrow 2 \rightarrow 4$
- C$4 \rightarrow 2 \rightarrow 3 \rightarrow 1$
- D$4 \rightarrow 3 \rightarrow 2 \rightarrow 1$