Answer: C. 14
Explanation:
The given data : 14, 17, 11, 17, 12, 13, 13, 14, 19, 25, 22, 18, 11, 23, 9
To find median, first we arrange it in ascending order as

Number of data values n=15 (odd)
It means,
The median value =

Hence, the median value = 14