By the end of which historical event had britain granted independence to most of the territories in its once vast empire?

WWII

Explanation:

Great Britain granted independence to most of its empire by the end of WWII. By the beginning of the 20th century, other great powers had arisen, such as the United States and Germany. As WWI began, Great Britain relied heavily on its colonies, and the fighting took a heavy toll on the military and financial resources of the empire. By the end of WWI, the empire was at its largest, but severely weakened.

During WWII, some of Britain's colonies were occupied. Moreover, the role of Great Britain in the war, despite its victory, weakened its image abroad, and the loss of prestige accelerated its decline, leading to independence movements in many of its colonies.

depends on your school

when i was in high school i took ap biology my senior year and it was the hardest one for me because my teacher finished the material within the first month of school and then went on to doing advanced college level it was horrible. but at a nearby school ap biology was one of the easier aps. also, it depends on what you are interested i like math a lot so ap calculus was easier for me than most but i hate history so ap us government was harder for me than most.