Relations between Britain and the United States in the nineteenth century could be characterized as a. harmonious at the diplomatic level but full of popular resentments on both sides.
b. generally peaceful, with occasional periods of tension.
c. marked by growing American economic supremacy.
d. constantly on the brink of war.
e. generally tense, with periods of both violence and peaceful resolution.

e. generally tense, with periods of both violence and peaceful resolution.

Explanation:

Relations between Britain and the United States in the nineteenth century defined as peace and violence. At the end of the American Revolution, Britain officially recognized American independence. Both countries established a diplomatic relationship in 1785. Despite having a connection, both countries often came close to war because of their foreign policies regarding trade. In the War of 1812, British restrictions on U.S. trade and America ambition to expand its region led both Britain and the United States to engage in war.