9. one main difference between the united states constitution and state constitutions is that state constitutions a. can't be amended. b. don't have bills of rights. c. don't provide for a legislature. d. are much longer.

The correct answer is D) are much longer.

One main difference between the United States Constitution and state constitutions is that state constitutions are much longer.

The states constitutions in the United States are much longer than the US Constitution because they contain more details that apply to each states' circumstances. The United States Constitution has 4,543 words. The states' constitutions have a double number of words. They include information about counties and local governments.