[单选题]
An ideal gas occupie.t /z r3r(l :g;s gfg+-phhrqhs qu86*t; ehdqfy; zz5 x$600 \; cm^{3}$ at $20 \; ^{\circ}C$. At what temperature will it occupy $1200 \; cm^{3}$ if the pressure remains constant?
A. $10 \; ^{\circ}C$
B. $40 \; ^{\circ}C$
C. $100 \; ^{\circ}C$
D. $313 \; ^{\circ}C$