Which expressions are equivalent to 12x + 8y.
A. 12(x + 8y)
B. 4(3x + 2y)
C. 2(12x + 4y)
D. 4(2x + 3y)
E. 6x + 6x + 4y + 4y
F. 5x + 3x + 3x + x + 6y + y + y
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