怎么做---**Question Stem:** Question 13 $x^\circ =$ **Chart/Diagram Description:** Type: Geometric figure illustrating angles formed by parallel lines and transversals. Main Elements: * Two horizontal lines. The top line has single arrows pointing right, and the bottom line has single arrows pointing left. These lines are implied to be parallel. * Three slanted lines intersecting the two horizontal lines. These slanted lines have double arrowheads pointing upwards, indicating they are parallel to each other. * An angle is labeled as 56°. This angle is located at the intersection of the bottom horizontal line and the leftmost slanted line. It is an acute angle formed between the bottom horizontal line and the leftmost slanted line, on the left side of the slanted line and below the top horizontal line. * An angle is labeled as $x^\circ$. This angle is located at the intersection of the top horizontal line and the rightmost slanted line. An arc indicates this angle is measured counter-clockwise around the intersection point, starting from the extension of the top horizontal line to the right, sweeping past the slanted line. This indicates a reflex angle. **Options:** A: 124 B: 304 C: 54 D: 66 E: None of these