Find the median of the data set that consists of $10,10,8,4,5,7,7,4,3,10$. A. 6.8 B. 7 C. 10 D. 7.5

Step 1 ：Arrange the data set in ascending order: \(3, 4, 4, 5, 7, 7, 8, 10, 10, 10\).

Step 2 ：Since the data set has an even number of observations, the median is the average of the two middle numbers, which are the 5th and 6th numbers in the sorted list.

Step 3 ：Calculate the average of the 5th and 6th numbers: \((7+7)/2 = 7\).

Step 4 ：Final Answer: The median of the data set is \(\boxed{7}\).