Two circles of radii 7 cm and 9 cm intersect at the points A and B. If AB = 10 cm and the distance between the centres of the circle is x cm, then the value of x is:

A

$$2(\sqrt6 + \sqrt7)$$

B

$$2(\sqrt6 + \sqrt{14})$$

C

$$(\sqrt6 + \sqrt{14})$$

D

$$(\sqrt6 + 7)$$