If a family of four produces three bags of trash each week how many of the same size bags of trash would you expect a family of 6 to produce each week

In my understanding if you look at the Question you would see that a family of four produces three bags of trash then you can think of a family of five with produce four and then a family of six what you’re trying to figure out it will produce five bags of trash

Iam not sure but i think the answer is b