A Gas Sample Has a Volume of 500 ML at 20

A gas sample has a volume of 500 mL at 20 ^$\circ$ C.At what Celsius temperature would the gas have a volume half as large?

A) (10 ^$\circ$ C)
B) (147 ^$\circ$ C)
C) (-147 ^$\circ$ C)
D) (-127 ^$\circ$ C)