The intersection of the spheres $x^2+y^2+z^2+7x-2y-z=13$ and $x^2+y^2+z^2 -3x+3y+4z=8$ is the same as the intersection of one of the sphere and the plane

Question

( A ) $x-y-2z=1$
( B ) $x-y-z=1$
( C ) $2x-y-z=1$
( D ) $x-2y-z=1$