Each of the Four Diagrams Below Shows a Magnetic Field $P$

Each of the four diagrams below shows a magnetic field pattern in a certain region of space (assume that the field is independent of position above and below the drawing's plane) .
What is the sign of these fields' curl component at point $P$ on each diagram in the direction facing us? (Hint: Draw a cross-sectional view of a small curl-meter centered on the point in question, and sketch the magnetic field vectors at the midpoint of each of the curl-meter's four sides in the drawing's plane. Don't worry about how we might create such a magnetic field.)
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A) The component of the curl in this direction is positive.
B) The component of the curl in this direction is negative.
C) The component of the curl in this direction is zero.