Answer:
B
Explanation:
To determine which fraction is bigger, we need to get every fraction under the same denominator.
In set A, 3, 8 and 5 have an LCM of 24
So we multiply (which we can because 8/8 = 1, 3/3 = 1, etc.)
2/3 times 8/8 -> 16/24
3/8 times 3/3 -> 9/24
and
5/12 times 2/2 -> 10/24
Since 10 > 9 but 9 comes before 10 in the set, A cannot be the answer, so B is.
