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Ann wants to print and frame a photo she recently took at the beach. She plans for the print to have the dimensions $10$ inches by $8$ inches, and she also plans to put a border around the photo that has an equal width all around.$\newline$The total area of the photo and border in square inches can be modeled by the expression $(10 + 2x)(8 + 2x)$, where $x$ is the width of the border in inches. This expression can also be written in the form $4x^2 + 36x + 80$.$\newline$What does the quantity $4x^2 + 36x$ represent in the expression?$\newline$Choices:$\newline$(A)the perimeter around the outside of the border in inches$\newline$(B)the area of the photo in square inches$\newline$(C)the length of the photo and border together in inches$\newline$(D)the area of the border in square inches$\newline$