[单选题]
An object sits on a fruwvyvje0t+,k l9m(fp0*w gg; ictionless surface. A 16-N forc:w0,hqb qdxxa4ia:1.trztw 7k hm2 p 5e is applied to the object, and it5a1.a 0 4:x,tdhb k7wrhw2mizt:xqp q accelerates at $2.0 \; m/s^2$. What is the mass of the object?
A. $4.0 \; kg$
B. $8.0 \; kg$
C. $32 \; kg$
D. $78 \; N$
