Answer:
A.She wants to keep them as special pictures to remember the trip.
Step-by-step explanation:
I would say it [A] because it says that "Their mom said that it was important to have a keepsake of their time together."
The Other Opinion:
[B] She wants to send them to the local newspaper to detail beach tourism.
Even if she wants to send them to local newspaper to detail beach tourism she would just take picture of the beach why a family photos? And also Lui's mother also say important to have a keepsake of their time together.
[C] She wants Lui and her sister to use the photos for reports when school starts back.
If Lui's mother want to use the photos for reports when school starts she can just take some but her mother took a lot of photos.
[D] She wants to make copies and send them to all of Lui’s extended family.
Just like the other opinion she states that important to have a keepsake of their time together and that like special picture to remember the trip.