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The theory is true _____ the hotter a body is, the more energy it gives off.

A. that                  B. when                       C. which                      D. what

．The theory is true _______ the hotter a body is, the more energy it gives off.

A．that                        B．when               C.  which                    D．what

．The theory is true _______ the hotter a body is, the more energy it gives off.

A．that                        B．when               C.  which                    D．what

．The theory is true _______ the hotter a body is, the more energy it gives off.