What do you think put an end to conflict with their major rivals that allowed the French to do or focus on?

Explanation:

The war began because of two main reasons: England wanted control of the English-owned, French-controlled region of Aquitaine, and the English royal family was also after the French crown. The sheer duration of this conflict means that there were many developments and lots of battles, too – 56 battles to be precise!

the answer is "focused on"

lol gave an answer 1 week that's the answer for those who need it in the future xd

i would say b. or c.