Geometry

Question Analysis：
This question examines the ability to recognize a glide reflection in action, especially when the transformation steps are described rather than named.
The main focus is identifying both reflection and parallel translation.

Key Concept Explanation：
Line y = 0 → horizontal
Translation: 6 units right → horizontal → parallel to reflection line
Reflection + parallel translation = glide reflection

Step-by-Step Solution：
A: ✖ No rotation involved
B: ✖ Not just a translation – reflection is involved
C: ✖ Not only reflection – translation is added
D: ✔ Both steps = glide reflection

Commo...