帮我讲解下这道题---**Question Number:** 23 **Question Stem:** Which figure appears to have exactly two lines of symmetry? **Options and Figures:** * **A:** A rectangle. * **B:** A hexagon. * **C:** A pentagon. * **D:** A square. **Chart/Diagram Description:** The image displays four geometric figures labeled A, B, C, and D, arranged in a 2x2 grid layout. * Figure A is located in the top-left position and appears to be a rectangle. * Figure B is located in the bottom-left position and appears to be a regular hexagon. * Figure C is located in the top-right position and appears to be a regular pentagon. * Figure D is located in the bottom-right position and appears to be a square. Each figure is a simple closed polygon drawn with black lines on a white background. The labels A, B, C, and D are placed to the left of their respective figures.