Answer:
In the 1800's, photography were important for memories of the people lost in the war, and to have a something to reminisce for good times.
Explanation:
Find out all of the combos of sums (2,3,5,9,3,4,6,10,4,5,7,11,5,6,8,12)
Then find out how many of these are divisible by 3 (6)
Count how many possibilities there are (24)
6/24=25%
