Answer:
B. La Salle?s ship
Explanation:
I watched the vid and if you look up the name it shows a ship hope you get a 100 :3 (you can do it)
It extended the number of hours in the day when people could work and play.
It was "Vladimir the Great" who ordered Russians to convert to Orthodox Christianity, since he was very much impressed by the Orthodox churches in Constantinople.
The answer to your question is,
C. Breaking up their hoplite formations with cavalry.
-Mabel <3