A point P moves along the path $$y = x^2 - 4$$. What is the displacement when the point moves from x = 1 to x = 3

A

$$8.24, @ \tan^{-1} (4)^\circ$$

B

$$2, @ \tan^{-1} (1)^\circ$$

C

$$11.3, @ \tan^{-1} (4)^\circ$$

D

$$11.3, @ \tan^{-1} (1)^\circ$$