The Symmetry-Integration Diagram Shows a Set of Situations Under Which

The symmetry-integration diagram shows a set of situations under which a nation should fix or float. There is a set of combinations of integration and symmetry beyond which the benefits of fixing outweigh the costs. This is shown as:

A) a positively sloped line from the origin, equidistant from both axes.
B) a negatively sloped line, above which a nation should fix and below which a nation should float.
C) a curved line that follows a random path through the space, coming close but never touching either axis.
D) a curved line, the slope of which is at first negative, then increases at an increasing rate as the benefits of fixing increase exponentially.