Uhh thats a test...... a or b
I'd personally go with A and C, The rest don't make too much sense. Don't count on my answer just yet though.
Answer:
13
Step-by-step explanation:
We're trying to find the distance between points X and Y. Or the distance of X-Z plus Z-Y.
Lets find the distance of X-Z
6-2=4
Now lets find the distance of Z-Y
15-6=9
Now we add the distances
4+9=13