[单选题]
An ideal gas in a container of a-bk i5*hb,02qh.of9a k rolt lq8i:pvolume xq+g4,tdc a*q$100 cm^{3}$ 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. $5.2 \times 10^{18}$
