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Trevor and his friends are making a four-square court that will be $10$ feet long and $10$ feet wide. To protect spectators from the action, they will include a safety zone around the outside of the court that will be the same width around each edge.$\newline$The total area of the court and safety zone together in square feet can be modeled by the expression $(10 + 2x)(10 + 2x)$, where $x$ is the width of the safety zone in feet. This expression can also be written in the form $4x^2 + 40x + 100$.$\newline$What does the quantity $4x^2 + 40x$ represent in the expression?$\newline$(A)the perimeter around the outside of the safety zone in feet$\newline$(B)the area of the court in square feet$\newline$(C)the length of the court and safety zone together in feet$\newline$(D)the area of the safety zone in square feet