A steam pipe is intended to be insulated with two layers of insulating materials of different thermal conductivities. For minimum heat transfer to take place_________________?

A. Either of the insulating material could be put on either side

B. The better insulating material should be put outside

C. The better insulation material should be put just next to pipe (i.e., inside)

D. ide (i.e., just next to the pipe)

E. Steam temperature is considered before deciding as to which insulating material is to be put

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