Siddhartha gautama founded the religion.
a. buddhist
b. hindu
c. shinto
d. islamic

A. Buddhist

Explanation:

Siddhartha Gautama founded the Buddhist religion.

This became official during the 3rd century BCE.

a system of cooperative federalism emerged, as the powers of the federal government expanded.

you can talk about what you learned about them. and you can talk about what happened on you're journeys with them. and then you can put all of the thing you learned about them in you're diary.