The equation of the tangent to the circle $x^2 +y^2 + 4x-4y + 4 =0$ which make equal intercepts on the positive co-ordinate axes, is :

Question

( A ) $x + y = 2\sqrt{2}$
( B ) $x+ y = 4$
( C ) $x+ y = 8$
( D ) $x + y = 2$