$$\mid \sqrt{10 + 2\sqrt{6} + 2\sqrt{10} + 2\sqrt{15}} \mid + \mid \sqrt{10 - 2\sqrt{6} - 2\sqrt{10} + 2\sqrt{15}} \mid =$$

A

$$2(\sqrt{3} + \sqrt{5})$$

B

$$2\sqrt{3}$$

C

$$2\sqrt{5}$$

D

$$2\sqrt{10}$$