[单选题]
10.21: Which terminology is best associa 9tl:z31zxnoo5:ijk kt l;*b(zvzope( ed with the amount of energy required to change the phase of a materialzb(o v*e;plz( per unit mass?
A. Thermal conductivity
B. Specific heat
C. Work
D. Latent heat
E. Entropy
