Probably the Greatest Blow to President Bush's Popularity, Reminding Americans

Probably the greatest blow to President Bush's popularity, reminding Americans of the importance of effective government, was

A) the politically risky campaign to reform Social Security.
B) mounting American casualties in Iraq.
C) the response to Hurricane Katrina.
D) the series of scandals that exposed lobbyists and members of Congress who had traded cash, campaign contributions, and gifts for legislative favors.