[单选题]
A wire carries a currt2 rl. upyaseujjq 1dtr;1j/4)5-xvmen4+jef9g 5)pqclf9 y dnt of 10 A in a direction of $30^{\circ}$ with respect to the direction of a 0.30-T magnetic field. Find the magnitude of the magnetic force on a 0.50-m length of the wire.
A. $0.75 \; N$
B. $1.5 \; N$
C. $3.0 \; N$
D. $6.0 \; N$
