The correct answer is (C) A two-masted sailing ship with square sails on the foremast and fore-and-aft sails on the mainmast. A pirate ship.

Examples of use:

• A brigantines usually had a tonnage of 150-300 tons.
  
  
• The brigantine, which could hold 10 cannons and a crew of 100, was a popular choice of pirates.