Which of the Following Statements Is True of Charles's Law $\frac { V } { T } = k$

Which of the following statements is true of Charles's law, $\frac { V } { T } = k$ ?

A) The volume of a gas varies proportionally with pressure.
B) The volume of a gas sample varies directly with the absolute temperature.
C) All gas samples of the same volume at STP contain the same number of atoms.
D) The pressure of a gas sample varies inversely with volume.
E) All gas samples of the same volume at STP contain the same number of molecules.