    Sentence 1+ H Car MeCall,cxchairman of the exchange 's special committee on  ‘xverance, resigned Thursday, sayingReed shoud start with "clean sate.”    ‘Sentence2: Reed arrived a day after. CarlMeCall,cochaiman ofthe exctang's special  committe on gvernance. resigned swing Reed shoul havea" clean slate “to make  changes.