Final answer:
The median of the set of numbers provided is c. 5.
Step-by-step explanation:
The median of the set of numbers provided is c. 5.
To find the median, we first need to arrange the numbers in ascending order: 2, 4, 4, 5, 7, 9, 15.
Since the set contains an odd number of values, the median is the middle number, which in this case is 5.