How did the structure
of American Government
promote or undermine
unity?

By promoting unity.

Explanation:

Promoting unity is one of the main factors in establishing a united American state and a national government. The occupation and tax policy of Great Britain led to the strengthening of the national identity. Promoting the Enlightenment ideas in the United States led to a sense of creating patriotism and nationalism in the country. In such proponents, there is a strengthening of political awareness in the colonial government, leading to a war of independence in the country.

your answer is

to dominate europe

and i know for a fact it can't be the others

the authority to tax.