For the cumulative distribution function 

$$F(x) = \begin{cases}0; & x < -1\\\frac{1}{2}(x + 1)^2; & -1 \leq x \leq 0 \\1-\frac{(1-x)^2}{2}; & 0 \leq x \leq 1\\1; & 1 < x < \infty \end{cases}$$

the upper quartile point is

A

$$1 - \sqrt{0.25}$$

B

$$1 - \sqrt{0.5}$$

C

$$1 + \sqrt{0.5}$$

D

$$1 + \sqrt{0.25}$$