Simplify : $$\frac{1}{{\sqrt 3+ \sqrt 4 }} \,+ $$$$\frac{1}{{\sqrt 4+ \sqrt 5 }} \,+ $$$$\frac{1}{{\sqrt 5+ \sqrt 6 }} \,+ $$$$\frac{1}{{\sqrt 6+ \sqrt 7 }} \,+ $$$$\frac{1}{{\sqrt 7+ \sqrt 8 }}\, + $$$$\frac{1}{{\sqrt 8+ \sqrt 9 }} = ?$$

Simplify : $$\frac{1}{{\sqrt 3+ \sqrt 4 }} \,+ $$$$\frac{1}{{\sqrt 4+

1.	Simplify : $$\frac{1}{{\sqrt 3+ \sqrt 4 }} \,+ $$$$\frac{1}{{\sqrt 4+ \sqrt 5 }} \,+ $$$$\frac{1}{{\sqrt 5+ \sqrt 6 }} \,+ $$$$\frac{1}{{\sqrt 6+ \sqrt 7 }} \,+ $$$$\frac{1}{{\sqrt 7+ \sqrt 8 }}\, + $$$$\frac{1}{{\sqrt 8+ \sqrt 9 }} = ?$$
A.	$\sqrt 3 $$
B.	$3\sqrt 3 $$
C.	$3 - \sqrt 3 $$
D.	$5 - \sqrt 3 $$
Answer» D. $5 - \sqrt 3 $$