[单选题]
The reason ocean temperatufl) auykffr6so e)g, w4smup*c*7 q77res b2t2/ y b z4vb(; tsy2mc/4vgkyojch3 do not vary drastically is that
A. water has a relatively high rate of heat conduction.
B. water is a good radiator.
C. water has a relatively high specific heat.
D. water is a poor heat conductor.