It is intended to build a mosaic with the shape of a right triangle, having three pieces available, two of which are congruent right triangles and the third is an isosceles triangle. The figure presents five mosaics formed by three pieces.
In the figure, the mosaic that has the characteristics of the one intended to be built is
(A) 1.
(B) 2.
(C) 3.
(D) 4.
(E) 5.