What explanation do liberal scholars attribute to democratic peace?
A.
Nations that share borders are more likely to develop friendly relations that reduce possibility of conflict?
B.
Non-democracies are more likely to engage in conflict because their norms promote aggression.
C.
The fall of the Soviet Union permitted the spread of democratic culture in Eastern Europe that makes war less likely.
D.
Democratic leaders are subject to 受制于 a wide array of constituents, reducing the prospects of war, whereas dictators are not answerable to any constituency 。选民、支持者