Which expression shows that 11 + 7 = 5 + 13?

A.

(5 + 6) + 7 = 5 + (6 + 7)

B.

6 + 6 + 6 = 18

C.

5 + 9 + 4 = 6 + 7 + 5

D.

(11 + 4) + 3 = (5 + 7) + 6

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