The Battle of Agincourt was fought on 25 October 1415, (Saint Crispins Day), in northern France as part of the Hundred Years War. The combatants were the English army of King Henry V, and that of Charles VI of France. The latter was not commanded by the incapacitated king himself, but by the Constable Charles dAlbret and various notable French noblemen of the Armagnac party. The battle is notable for the use of the English longbow, which helped the English compensate for their inferior numbers. The battle was also immortalised by William Shakespeare as the centrepiece of his play Henry V.

Question: Constable Charles dAlbret was a member of the Armagnac party.
Options:
A. true, B. false, C. uncertain
Answer: "C"