Let C be the intersection curve of the cylinder x² + y² = 1 and the plane x + z = 1. The curve is counterclockwise if viewed from above. Let F(x, y, z) = (y − z)i + (z − x)j + (x − y)k. Do the
a) Curl of F is zero
b) Divergence of F is zero
c) Gradient of F is zero
d) None of the above
