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

A

$$1 + \sqrt{3} + \sqrt{7}$$

B

$$1 + \sqrt{2} + \sqrt{7}$$

C

$$\sqrt{2} + \sqrt{5} + \sqrt{7}$$

D

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