The goal of the Frankfurt Assembly was

o to build a palace in Berlin

to unite the German states

o to declare war on France

to oust the Prussian king Frederick William IV

The correct answer is: to unite the German states

Explanation:

The Frankfurt Assembly (also called The Frankfurt Parliament) was a national assembly formed in Frankfurt in 1848.

Its main purpose was to organize the unification of Germany (German speaking countries), by drafting a constitution where Germany would be a constitutional monarchy led by a hereditary emperor.

However, the Assembly failed to unify the German states, as its members reflected specific interests of the German ruling classes, so they hadn't been able to agree on their common goals.