The Answer to the Problems of Adverse Selection and Moral

The answer to the problems of adverse selection and moral hazard are found partly in the fact that

A) elections work through competition, which motivates rational candidates to formulate policies that will please voters.
B) elections do not require candidates to reveal much information about themselves.
C) electoral laws are fungible and change frequently, leaving candidates largely unregulated.
D) history matters, so candidates who have won elections before will win again.
E) when many peoples' preferences are assembled together, these small problems usually vanish due to the large numbers of voters.