3. Which statement from Source B or C best corroborates the overall argument in Source E? "Closed primaries are the most rampant form of voter suppression of the 21st century." (Source B) "Independent voters are paying for elections with their tax dollars." (Source B) "Many reformers look to open primaries as a tool for reducing the partisanship of elected officials but such reforms have proven pretty ineffective." (Source C) "People with weak party attachments __ tend not to participate in primaries even if they're allowed to." (Source C)