Depending on the radiating properties, a body will be opaque when _________________?

A. x 0, a + p = 1

B. a=0,x + p= 1.

C. p = 0, x = 0 and a = 1

D. p = 0, x = 1 and a = 0

E. p=l,x = 0anda = 0

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