Perform the Indicated Operation $(2+\sqrt{6})(2-\sqrt{6})$ A) -4
B) -2
C) $2-2 \sqrt{6}$

Perform the indicated operation.
- $(2+\sqrt{6}) (2-\sqrt{6})$

A) -4
B) -2
C) $2-2 \sqrt{6}$
D) 10