Answer:
B.

Explanation:
[] Let's draw a picture
-> See attached
[] Looking at the picture and seeing the words halfway being used, we can tell we will need to use the midpoint formula.
-> See attached
[] We will use the midpoint formula between Sarah's house (7, -2) and Mandy's house (3, 5) to find Cameron's house.



[] Now we will use the midpoint formula between Cameron's house (
) and Mary's house (3, 5) to find Kayla's house.




-> This leaves us with option B.

Have a nice day!
I hope this is what you are looking for, but if not - comment! I will edit and update my answer accordingly.
- Heather