Answer:
B. Reflection over the Y-axis
Step-by-step explanation:
See the attached graph.
Assuming the original is the blue triangle, if reflected over the X-axis, the reflection would end up in the IV quadrant.
If reflected over the Y-axis, the reflection would end up in the II quadrant.
Rotation doesn't rotate about an axis. It's usually rotate about a point. For example: Rotate 90° clockwise about the point (-1,-5)