Which of the shapes below are split into quarters? Select all that apply.
Four shapes, A through D, cut into equal pieces. Shape A is a horizontal rectangle with one line down the middle vertically and one line down the middle horizontally. Shape B is horizontal square with one line down the middle vertically. Shape C is a circle with two diagonal lines crossing in the center of the circle. Shape D is a circle with one line down the middle vertically and one line down the middle horizontally.