Which of the Following Explains Why a Pair of Democracies

Which of the following explains why a pair of democracies is more likely to reach a war-avoiding bargain than a pair of autocracies?

A) Democracies have more transparent political processes,which can alleviate information problems in crises.
B) Citizens in democratic states are less aggressive than citizens of an autocratic regime.
C) Autocratic leaders are indecisive,which makes it difficult to settle on acceptable terms.
D) Bargaining is more likely to succeed when two states have similar regime types.