10. Rewrite the statement “A quadrilateral is a figure with four sides.” In the If- then form.
A. A figure has four sides if and only if it is a quadrilateral.
B. If a figure is a quadrilateral, then it has four sides.
C. If a figure has four sides, then it is a quadrilateral.
D. A figure is a quadrilateral if and only if it has four sides.