Nadia says the hypotenuse of this right triangle has a length of 73 because the Pythagorean theorem states that
(28+45)^2 - 73^2

Which best describes Nadia's solution?

A. She is correct because she applied the Pythagorean theorem properly and her arithmetic is accurate.
B. She is incorrect because she should have used 45 as the length of hypotenuse.
C. She is incorrect because she should have squared each leg length and then found the sum.
D. She is correct because the hypotenuse is the longest side of the triangle.