challenge: What event prompted Captain Cyprian Southack and Captain Thomas Smart to lead a raid on Canso in 1718?
  
  A. The French attacked a British settlement on Grassy Island
  B. The Mi'kmaq raided and burned Southack's station at Shelburne
  C. The British discovered a hidden French fort on Canso
  D. The Mi'kmaq formed an alliance with the French
  Answer: 