What was the initial cause that triggered the beginning of the Hundred Years' War in 1337?

A religious disagreement over the leadership of the Catholic Church.

A feudal dispute concerning the rightful heir to the French throne.

A trade embargo that England placed on French wine and textiles.

The French invasion of English territories in the British Isles.

The introduction of the longbow during the Hundred Years' War was a significant military innovation primarily because it could:

be used effectively while riding a horse.

launch flaming projectiles over castle walls.

pierce the armor of mounted knights from a distance.

be constructed quickly on the battlefield using common materials.

It became a vassal state under the control of the English monarchy.

It emerged as a more unified nation with a stronger central monarchy.

It was permanently divided into smaller, independent feudal territories.

It adopted England's parliamentary system of government to limit the king's power.

It started as a naval conflict and ended as a series of peasant revolts.

It evolved from a feudal dispute between nobles into a war between nations.

It began as a religious crusade and finished as a struggle over trade routes.

It transformed from a war of conquest into a purely defensive struggle for France.