We are given a table that shows the relationship between the number of weeks of vacation employees receive each year based on the number of years they have been employed.
On the left side, we have the number of years of service and on the right side, we have the number of weeks of vacation.
v(15) = 5
Here 15 is the years of service and 5 is the weeks of vacation.
So, it means that a worker with 15 years of service gets 5 weeks of vacation each year.
Therefore, the correct answer is option C.