[单选题]
Sue and Sean are having a tug-ecdrvo w()03fy1o bw2of- j4qc w2r5om)vzu--ibwar by pulling on opposite ends of a 5.0-kg rope. Sue pulls with a 15-N vw-jq)2um4co br- i5z force. What is Sean's force if the rope accelerates toward Sue at $2.0 \; m/s^2$?
A. $3.0 \; N$
B. $5.0 \; N$
C. $25 \; N$
D. $50 \; N$
