Why Were the Democrats Unsuccessful in Setting Deadlines for American

Why were the Democrats unsuccessful in setting deadlines for American military withdrawal from Iraq after Bush's reelection in 2004?

A) Democratic leaders, including 2004 presidential candidate John Kerry, believed that victory was possible and urged their party members in Congress to support President Bush.
B) Military intelligence supported evidence that Iraq had WMDs and posed a real threat to American security.
C) Their narrow majority in Congress made it impossible to override Bush's vetoes on funding bills that attached deadlines for military withdrawal.
D) Constituents in most Democratic congressional districts pressured their congressional representatives to support the war.