What problems were reported with election results in Florida in the 2000 election?

What problems were reported with election results in Florida in the 2000 election?
 
  A) The election included announcements by police of road blocks in white neighborhoods.
  B) In many cases, whites were denied the right to vote by blacks and Hispanics.
  C) Many votes were thrown out as undervotes or overvotes, especially in the four districts with the highest concentration of African Americans in the state.
  D) The problems in Florida were purely politicalthe Democrats in power refused to allow Republicans to vote at most polling stations.