Ma'am Karen designed a rectangular garden. Her garden has a length of (a-4) meters and width of (a - 8) meters. If the area of the garden is 117 square meters, what is the measure of its length and width? A.I= 9, w= 13 B. I = 13, w = 9 C. l = 4, w = 8 D. I = 8, w = 4