[单选题]
A 25-L container holds hydrogen gas at a gau; l-l6o/dxmw1om i(jo oad+ ;mx5f/n+b *qnkvge pressure of 0.25 atm and a temperatureq5 *a+knxbfmo ;n/+dv of $0 \; ^{\circ}C$. What mass of hydrogen is in this container?
A. $1.4 \; g$
B. $2.8 \; g$
C. $4.2 \; g$
D. $5.6 \; g$