A biologist studied the populations of black bear and brown bears over a 10-year period. The biologist modeled the populations, in thousands, with the following polynomials where x is time, in years. black bears: 2.3x2 - 5.6x + 2.3brown bears: 2.4x2 + 7.2x + 0.97What polynomial models the total number of brown and black bears?
A. 4.7x^2 + 1.6x + 3.27
B. 4.7x^2 - 1.6x - 3.37
C. 4.7x^2 + 1.6x - 3.37
D. 4.7x^2 - 1.6x + 3.37
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