The correct answer is B. For sure it is. It took a while to solve in my head
Median is the middle number. To find median, the numbers must be ordered from least to greatest. The numbers are already ordered.

The middle numbers are 36 and 55, with 2 numbers on each side.
a, b, c, d, e, f
Add the 2 numbers and divide by 2

Now divide by 2

The median is 45.5
The height of the enlarged picture will be 20 in because 15 divided by 6 is 2.5 so you multiply 2.5 by 8 in and you get 20.