How did the Hundred Years’ War contribute to the decline of the medieval era?

The Impact of the Hundred Years' War The Hundred Years' War contributed to the decline of feudalism by helping to shift power from feudal lords to monarchs and to common people. During the struggle, monarchs on both sides had collected taxes and raised large professional armies.

Explanation:

It led to the collapse of the feudal system.

Explanation:

Quoting Pearson World History:

The Hundred Years' War brought many changes to the late medieval world. The longbow and cannon gave common soldiers a new importance on the battlefield and undermined the value of armored knights on horseback. Although neither nobles nor commoners knew it then, feudal society was changing and medieval Europe was coming to an end. Knights and castles were doomed to disappear. Strong monarchs needed large armies, not feudal vassals, to fight their wars.

when studying cause and effect, historians usually group the causes into different categories. for example, cultural causes reflect how a society’s literature and art convey the way the society saw itself in relation to the rest of the world. another resource that historians use to understand society is pop culture, which tells them the trends and ideas that are preferred by the common people. when studying cause and effect, it’s important to remember multiple causation, or the idea that an effect could have several causes and vice versa.  

the correct option is “cultural causes” since art and literature are related to the culture of a place. culture is determined by literature, art, music.

the correct option is “pop culture” since it reflects the likes and ideas of common people whereas the rest of the options do not focus on common people.  

the correct option is “multiple causation” since it refers to the idea that events are caused by multiple reasons, not just a single one.