[单选题]
An ideal gas occupies 4. nzg )yjv*r) )bd79gadd1cfh+0 L at g6w mnl;-7 v4-l)+ pujg rjusw$20 \; ^{\circ}C$. 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. $2.0 \; L$
