Which statement best explains why the value of this expression is equal to - 812y? 414x - 812y - 414x
A. When x = 0, the first and last terms are 0, so the value of the expression is - 812y.
B. 414 is half of 812, so the two 414's will cancel out 812.
C. The sum of a number and its opposite is 1, and the product of any number and 1 is the number itself.
D. The sum of a number and its opposite is 0, and the sum of any number and 0 is the number itself.
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