The answer has to rationally be 14, because it is a longer side than the other which is 7 times the square root of 2 and 7 times square root of 3 and it cannot be 7 because that is less than the results of both the other options that are incorrect. Fourteen is the highest option, and the angle opposite the right angle must be the hypotenuse, which means the longest side of the triangle. Therefore, 14 is the answer.
