[单选题]
An ideal gas occupie pm79fuh/a6fdg qhszv. k3(*3xa 7t*hr-bimv 9mxkggqk tm8ie *q 3p8ob08 z,7z0kuxs 4.0 L at $20 \; ^{\circ}C$. What volume will it occupy at $40 \; ^{\circ}C$ if the pressure remains constant?
A. $43 \; cm^{3}$
B. $4.3 \; L$
C. $8.0 \; L$
D. $2.0 \; L$
