A、a simple majority vote B、an overwhelming majority vote C、at least 60 votes D、100 votes A

Despite two failed attempts, the White House on Wednesday said it wanted the Senate to vote again to try to win confirmation of John Bolton as U.S. ambassador to the United Nations.
   But Republican and Democratic senators said the stalemate continued on Bolton’s nomination over demands from Democrats that the White House provide information they said would shed more light on his suit ability for the job.
   The nomination of the blunt-spoken conservative has been held up by accusations he tried to manipulate intelligence and intimidated intelligence analysts to support his hawkish views in his post as the top U.S. diplomat for arms control.
   "We continue to believe that John Bolton should have an up or down vote on the floor of the Senate. That remains our position," White House spokesman Scott McClellan said.
   If that fails, McClellan declined to say whether Bush would favor bypassing the Senate with a presidential appointment while Congress takes its August recess.
   "Discussion is still going on about Bolton, but we have to make some progress before we take it back to vote on it. We talked about it again this morning," Senate Majority Leader Bill Frist, a Tennessee Re publican, told reporters after mceting with President Bush on Tuesday morning.
   In procedural votes in May and June, Democrats denied Republicans the 60 votes needed from the 100-member chamber to bring debate on Bolton to a close and move to a confirmation vote which would require a simple majority.
   A number of senators said they expected Bush to make the recess appointment which would allow Bolton to take up the U.N. post and serve until January 2007.
   There also have been questions whether Bolton would accept a recess appointment, which lawmakers said would send him to the United Nations in a weakened political position.
   Norm Kin2, spokesman for Joseph Biden of Delaware, top Senate Foreign Relations Committee Democrat,  said the Senate could quickly move to an up or down vote on Bolton if the White House turned over the requested information.
   The White House has refused to turn over the material which it said was highly classified and concerned internal deliberations not relevant to Bolton’s nomination.