Which image is a reflection of the right triangle shown over the given line of reflection?

A blue triangle and a line are shown.The triangle has a horizontal side on the bottom, a vertical side on the right, and a diagonal side that goes up from the left end of the horizontal side to the top of the vertical side. The horizontal side is shorter than the vertical side. A right angle symbol is shown between the horizontal and vertical sides. A vertical line is shown to the right of the triangle.
A. A blue triangle is shown.The triangle has a horizontal side on the bottom, a vertical side on the left, and a diagonal side that goes up from the top of the vertical side to the right end of the horizontal side. The horizontal side is shorter than the vertical side. A right angle symbol is shown between the horizontal and vertical sides.
B. A blue triangle is shown.The triangle has a horizontal side on the top, a vertical side on the right, and a diagonal side that goes up from the left end of the horizontal side to the bottom of the vertical side. The horizontal side is shorter than the vertical side. A right angle symbol is shown between the horizontal and vertical sides.
C. A blue triangle is shown.The triangle has a horizontal side on the bottom, a vertical side on the right, and a diagonal side that goes up from the left end of the horizontal side to the top of the vertical side. The horizontal side is longer than the vertical side. A right angle symbol is shown between the horizontal and vertical sides.
D. A blue triangle is shown.The triangle has a horizontal side on the bottom, a vertical side on the right, and a diagonal side that goes up from the left end of the horizontal side to the top of the vertical side. The horizontal side is shorter than the vertical side. A right angle symbol is shown between the horizontal and vertical sides.