Which rectangular prism has a surface area of 56 square units? [Note: Art is not drawn to scale.] a A rectangular prism with a length of 5, width of 3, and height of 1. b A rectangular prism with a length of 2, width of 2, and height of 6. c A rectangular prism with a length of 5, width of 3, and height of 2. d A rectangular prism with a length of 6, width of 2, and height of 4.