[单选题]
A material with a mass of m is he ustkcv1v0u/ ohq 5 *kkyna(v3uc( x4*ated4 ree-z.8zra dl2xh4jdak1:l . The graph shows the variation of the temperaturejke8h24aza-lx1der:4dl. r z of the material with the energy supplied.
Which one of the following gives the specific heat capacity of the material?
A. $\frac{2Em}{T_2-T_1}$
B. $\frac{Em}{T_1}$
C. $\frac{2E}{m(T_2-T_1)}$
D. $\frac{E}{m(T_2-T_1)}$