The distance between the points (a, - b) and (- a, - b) are

1.	The distance between the points (a, - b) and (- a, - b) are
A.	\(\sqrt {\rm{2}} {\rm{a}}\)
B.	0
C.	2a
D.	\(\sqrt {\rm{2}} \left( {{\rm{a + b}}} \right)\)
Answer» D. \(\sqrt {\rm{2}} \left( {{\rm{a + b}}} \right)\)

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