Why are states called "laboratories of democracy"?

a. most new social policy ideas are tried by one or two states before the other states or the federal government adopt the ideas.

b. states are the primary sponsors of industrial research.

c. the federal government experiments with policies by ordering the states to try them first.

d. the term comes from the nineteenth century, when state politics were more scientific than the machine politics of cities.

a. Most new social policy ideas are tried by one or two states before the other states or the federal government adopt the ideas.

Explanation:

Social ideas that can have an effect on the society are implemented by one or two states and if the idea or policy turns out to be beneficial for the people then it is adopted by others. For instance, the legalization of Marijuana was first done by Washington and Colorado in 2012. The idea started in 19th century when women voting rights were first introduced by Wyoming and California which lead to a national call for rights. Hence, option A is the correct option that new social policy ideas are tried by one or two states before the other states or the federal government adopt the ideas.

a charter of rights that the rebellion made for king john to approve for basic rights.

"choosing is refusing" means individuals face an opportunity cost with each decision they make. economists state that every decision involves trade-offs. opportunity cost is the least desirable alternative given up as a result of a decision.