When a point \((x, y)\) is reflected across the x-axis, the y-coordinate changes sign, while the x-coordinate remains the same. Therefore, the reflection of point A(-4, -1) would be A'(-4, 1), the reflection of point B(-5, -2) would be B'(-5, 2), and the reflection of point C(-10, -1) would be C'(-10, 1).
So the coordinates of the reflected triangle A', B', and C' are:
A'(−4, 1), B'(−5, 2), and C'(−10, 1).
Thus, the correct response is: A′(−4,1), B′(−5,2), and C′(−10,1).