[单选题]
A mass of 50 kg is suspended from a steel wi ybuon26:xg7v *vgy c4sjp*,+xe p 6znfm82cyre of diameter 1.0 mm and length 11.2 m. How much will the wire stretch? The Young's modulus for steel iym4 xzec,j6*g pfy*2v c8spn +s $20 \times 10^{10} \; N/m^2$.
A. $1.5 \; cm$
B. $2.5 \; cm$
C. $3.5 \; cm$
D. $4.5 \; cm$
