[单选题]
An ideal gas occupies 300 L at an absolute pr1d5yueqb j6 9iessure o04*xpqx y42imb -ivbdf 400 kPa. Find the absolute pressure if the volume chan- vq 4ii2*y0 bxpdb4mxges to 850 L and the temperature remains constant.
A. $140 \; kPa$
B. $640 \; kPa$
C. $850 \; kPa$
D. $1140 \; kPa$