According to the u. s. constitution, a.the federal constitution supersedes all other state laws and state constitutions. b. state constitutions supersede federal law. c. federal law supersedes the federal constitution. d. state constitutions are coequal with the federal constitution. e. state law supersedes federal law

c. the federal constitutions supersedes all other state laws and state constitutions

Explanation:

A federal constitution is a document which is established for the stating the relationship of the federal government to the people as precise as possible.

It also defines a relationship between the federal government and the individual political entities.  

It can also be defined as a document which enables the sharing of powers between the three arms of government which are the judiciary, Legislative,and Executive.

well, there are a lot of places we get information about earth from. like science classes, websites, books, newspapers, etc.