For any integers a and b with HCF (a, b) = 1, what is HCF (a + b, a - b) equal to?

For any integers a and b with HCF (a, b) = 1, what is HCF (a + b, a -

1.	For any integers a and b with HCF (a, b) = 1, what is HCF (a + b, a - b) equal to?
A.	It is always 1
B.	It is always 2
C.	Either 1 or 2
D.	None of the above
Answer» D. None of the above