The answer is C (20 units and h = 9.6 units)
By looking at the image, all we need to do is look at our given values to get the base and height. The base is the length of the bottom side of the triangle that is perpendicular to the height (the dashed line). 20 is the length on the bottem line (base) and 9.6 is the length of the dashed line (height). Meaning the base is 20 and the height is 9.6. Hope this helps.