Geometry

The answer is D. AC and XZ.

 

1. Recall the definition of a line:

A line extends infinitely in both directions and is denoted by two - points on the line with a double - headed arrow above them.

 

2. Analyze each option:

A.For , it is a ray because it starts at point  and extends infinitely through point  in one direction. For , it is also a ray starting at point  and extending infinitely through point  in one direction. So, this option is incorrect.

 

B. is a ray starting at point  and extending infinitely through point  in one direction, and  is a ray starting at point  and extending infinitely through point  in one direction. So, this option is incorrect.

 

C. is a line as it extends infinitely in both directions passing through points  and