[单选题]
On a cold day, a piece of metal feels mucho y9hlgql zyp;)8ptsdo0;1 ;p c k9z ku45m5k;uiy ft21liy2onolder to the touch than a piece of wood.5i51 2ymkntuif lkyk94 ou; z2 This is due to the difference in which one of the following physical property?
A. density
B. specific heat
C. latent heat
D. thermal conductivity