For $$a \geq 4, \sqrt{3(a - 1) + 2\sqrt{2a^2 - 7a - 4}} =$$

A

$$\sqrt{a + 1} + \sqrt{a - 4}$$

B

$$\sqrt{2a - 1} + \sqrt{a + 4}$$

C

$$\sqrt{2a + 1} + \sqrt{a - 4}$$

D

$$\sqrt{2a + 1} - \sqrt{a - 4}$$