The Significance of the Battle of Saratoga Was That It

The significance of the Battle of Saratoga was that it:

A) removed the Indian tribes from the fighting.
B) demonstrated the impairment of having the seasoned French officer the Marquis de Lafayette on the side of the patriots.
C) let the colonists know that winning the war might not take a very long time.
D) convinced several European countries, most importantly France, to join the patriots in their fight against Britain.
E) maintained the patriots' hopes for freedom, even though they lost the battle.