Rationalize the denominator of the given expression: (√2 - √5/√2 - √7).

a) ( √2 - √5/5 - √14 )
b) ( 5 - √14/√2 - √7 )
c) ( √2 + √5/√2 - √7 )
d) ( √2 - √7/√2 - √5 )