[单选题]
A horizontal force of 5.0 N accelerates a 4.0qn.l-lz( b6zr t .-kv;( qocaf-kg mass, fr y12 /c3au(.+0ujoxfmgl,in/j g6hbdtxn( wsom rest, at a rate of $0.50 \; m/s^2$ in the positive direction. What friction force acts on the mass?
A. $2.0 \; N$
B. $3.0 \; N$
C. $4.0 \; N$
D. $5.0 \; N$
