**Core Concept**
The question requires understanding of statistical concepts, specifically the calculation of the median, which is the middle value in a dataset when it is ordered from smallest to largest. In an even-numbered dataset, the median is the average of the two middle numbers.

**Why the Correct Answer is Right**
To find the median of the given values 2,5,7,10,10,13,25, first arrange them in ascending order, which is already done. Since there are 7 numbers (an odd number), the median is the 4th number, which is 10.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because it does not represent the middle value of the dataset.
**Option B:** This option is also incorrect as it does not correspond to the median of the given dataset.
**Option D:** This is incorrect because, although it might seem like a possible average, it's not the median of this specific set of numbers.

**Clinical Pearl / High-Yield Fact**
Remember, when dealing with an odd number of values, the median is the middle number. For an even number of values, the median is the average of the two middle numbers.

**Correct Answer:** C. 10