On A $p - V$ Diagram, If Both Curves Intersect at One Point, the Slope

Multiple Choice

On a $p - V$ diagram, if both curves intersect at one point, the slope of an isothermal curve (compared to an adiabatic curve) at the point of intersection is

A) steeper.
B) less steep.
C) equal in steepness.
D) none of the above; it depends on the intersection point.