A right rectangular pyramid is sliced parallel to the base, as shown.

What is the area of the resulting two-dimensional cross-section?

15 cm²
18 cm²
25 cm²
50 cm²

Rectangular pyramid intersected horizontally by a rectangle. The base of the pyramid measures 10 centimeters by 6 centimeters, and the height is 5 centimeters. The part of the rectangle that intersects the pyramid is a gray rectangle. The smaller rectangle measures 5 centimeters by 3 centimeters.