Which expressions describe the area of the shaded region? select all that apply. a rectangle is divided into 12 columns and 6 rows, making 72 smaller rectangles. an area that includes 9 smaller rectangles and is the intersection of 3 of the 12 columns and 3 of the 6 rows is shaded. a. 3 12 × 3 6 312×36 b. 3 10 × 1 2 310×12 c. 1 4 × 1 2 14×12 d. 1 4 × 1 3 14×13 e. 4 12 × 3 6 412×36