(D) Let $I = \int_{-2}^{2} |x| \, dx$. Since $|x|$ is an even function,we can use the property $\int_{-a}^{a} f(x) \, dx = 2 \int_{0}^{a} f(x) \, dx$.

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(D) Let $I = \int_{-2}^{2} |x| \, dx$. Since $|x|$ is an even function,we can use the property $\int_{-a}^{a} f(x) \, dx = 2 \int_{0}^{a} f(x) \, dx$. $I = 2 \int_{0}^{2} x \, dx$. $I = 2 \left[ \frac{x^2}{2} \right]_{0}^{2}$. $I = 2 \left( \frac{2^2}{2} - \frac{0^2}{2} \right)$. $I = 2 \left( \frac{4}{2} \right) = 2(2) = 4$.