What does the hegemonic stability theory state?

a. Presence of a hegemon increases stability and order in the international system.
b. A presence of several states of similar power stabilizes the international system.
c. A presence of hegemonic international organizations like the UN increases
stability and order in the international system.
d. Peace enforcement allows for an emergence of a hegemon and increasing stability
in the international system.
e. A presence of a hegemon destabilizes the international system so no hegemon
should be present.

a