AMC 8 2019 Problem 21

What is the area of the triangle formed by the lines $y=5$, $y=1+x$, and $y=1-x$? $\textbf{(A) }4 \textbf{(B) }8 \textbf{(C) }10 \textbf{(D) }12 \textbf{(E) }16$