Which of the following best describes the states’ rights debate of the early and mid-1800s?

Which of the following best describes the states’ rights debate of the early and mid-1800s?

a. a conflict between the idea of federalism and the US Constitution
b. a conflict between the ideas of federalism and sectionalism
c. a conflict between the rights of one state and the rights of another
d. a conflict between the ideas of sectionalism and nullification