In simple words, Unlike WWI, which was battled in trench with machine weapons as well as biological weapons, WWII was conducted with modern weapons and equipment, with more aircraft, warships, vehicles, and submarine. During the war, special operations techniques, as well as atomic weapons and covert communications, were created.
The correct answer to this question is the letter D.
It says that South Asia had a small number of regional states and consequently had fewer oppositions that prompted ruling classes to unify their dominions.
Stamp act, intolerable act, pretty much taxing the colonists too unreasonable and unrealistic standards to pay off war debt from the French and Indian war