Which of the following is equivalent to the expression below?

(a^2 - 2b^2 + 3) - (4b^2 - 5) + (3a^2 + 4)

A. 4a^2 - 6b^2 + 12

B. 4a^2 - 6b^2 + 2

C. 4a^2 + 2b^2 + 2

D. 4a^2 + 2b^2 + 12

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981,657 rounded to nearest ten thousand

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