[单选题]
An ideal gas in a cok dt; z*0 nnk-m-uwnr3io-a5xhd1snj+ t +x d 5( 4hx/cv)oaewntainer of volume $100 cm^{3}$ at $20 \; ^{\circ}C$ has a pressure of $100 \; N/m^2$. Determine the number of gas molecules in the container.
A. $4.2 \times 10^{6}$
B. $6.0 \times 10^{23}$
C. $2.5 \times 10^{18}$
D. $5.2 \times 10^{18}$
