Which of the Following Options Would Cause a Poll/poll Collection

Multiple Choice

Which of the following options would cause a poll/poll collection to load all entities that have been posted during April, 2011?

A) $collection->addAttributeToFilter('date_posted', array('from'   =>   '2011-04-01',    'to'   =>   '2011-04-30') ) ;\
B) $collection->addFieldToFilter('date_posted', ) ;
C) $collection->addPostDateFilter('2011-04-01', '2011-04-30') ;
D) $collection->addFieldToSelect(('date_posted', arrayCfrom' => '2011-04-01', 'to' => '2011-04-30')