Geometry

Question Analysis：
This problem combines two common transformations about the origin, testing understanding of both rotation and reflection rules.

Key Concept Explanation：
90° CW Rotation: (x, y) → (y, -x)
Reflection over y = x: (x, y) → (y, x)
Transformation Sequence: Rotation must be performed first

Step-by-Step Solution：
Apply 90° CW rotation: (4, -7) → (-7, -4)
Reflect over y = x: (-7,-4) → (-4,-7)

Option Analysis：
A) Incorrect transformation sequence
B) Rotation-only result
C) Correct final coordinates
D) Incorrect reflection

Common Mistakes：
Reversing the operation order
Confusing ...