Geometry

Question Analysis:
This question tests understanding of reflection and rotation in sequence.
Focus: How rigid motions affect congruence.

Key Concept Explanation:
Both reflection and rotation are isometries.
They preserve size and shape.

Step-by-Step Solution:
Reflecting over y-axis changes orientation but not size.
Rotating 90° also preserves shape and size.
Combined, the final image is congruent.

Option Analysis:
A is correct — both are isometries.
B and C are incorrect —...