Which of the following BEST describes the Industrial Workers of the World $($IWW$),$ or Wobblies?

The IWW only accepted industrial working males.

The IWW only accepted farmers as members.

The IWW were more peaceful than the AFL or Knights of Labor, and accepted workers of all races and genders.

The IWW was a more radical and confrontational union that accepted all workers, regardless of race or gender.