Generally speaking, "d.Language barriers" were not a problem faced by multi-ethnic countries in Africa after independence, since relative to some of the more serious problems, like genocidal violence, this was not an issue.
He was an American trumpeter who was one of the most influential jazz figures
A - to pay off the debts from the French and Indian War
The British Parliment felt they had the right to tax the colonies to pay off their war debts they had incurred during the Seven Years' War.