[单选题]
An object sits on a friction ba1yz 8b2mv++brl+dc 7rum 3,mdusjne 888:oi l txb8less surface. A 16-N force is applied to the object, and it3um8utb i rj eol8s 7d8xmn:8, 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. $78 \; N$