Why did world war 1 last so long? A. Because it took so long to move troops and resources to the different battlefields around the world.
B. Because neither side was willing to admit defeat until an obvious winner was determined.
C. Because neither side was able to make significant advances against the other, creating a stalemate.
D. Because America refused to get involved in Europe's political squabbles.

not sure but

Explanation:

The destruction and length was mostly due to the new technological advances of: machine guns, barbed wire, and rapid firing artillery. Also the new “trench warfare” method caused many deaths on both sides but prevented any significant advancement. ... Stalemate-deadlock made the war long as advance was very difficult.

you really can't answer this on your own?

the stamp act was passed by the british parliament on march 22, 1765. the new tax was imposed on all american colonists and required them to pay a tax on every piece of printed paper they used. ship's papers, legal documents, licenses, newspapers, other publications, and even playing cards were taxed.