[单选题]
A mass is hung from identihthk2p 4cm4rf 24tar v. y0+gjc7 )duy/a6 vn8zj.zyg w68wqwbal wires made of aluminum, brass, copper, and steel. Whi6.jan8 zvd7 bw6 u/)8zqgwyywch wire will stretch the least?
A. aluminum
B. brass
C. copper
D. steel
E. all the same
