Why was it difficult for the provinces of Central America to be one government? no experience in running a government
Spain had left too many soldiers
the upper class wanted their own country
too different from each other

no experience in running a government

Explanation:

The provinces of Central America found it very difficult to become one government because even though they had economic problems, the main problem was a problem of having proper experience to run a government.

The new leaders knew very little, if anything at all of ruling a country and they were not helped by the weak people they ruled, so wicked rulers sprang up and made it difficult for the provinces of Central America to be one government.

answer; /// i believe that the correct answer is (d)the huang he river valley;