Answer:
C. 12 to 32
Explanation:
The simplified ratio would be 3:8
So multiply 3*4=12
And multiply 8*4=32
12:32
The reason the other ones wouldn't work is because 3 and 8 are not multiplied by the same number
For example
A.)15 to 32 wouldn't work because there not multiplied by the same number
3*5=15
8*4=32