which of the following best describes an
important strength of the articles of
confederation?
a. it provided for strong state governments.
b. it limited each state's power in congress.
c. it provided for a strong central government.
d. it provided for a system of checks and balances.

D.  It provided for a system of checks and balances.

Explanation:

After the signing of the Articles of Confederation, thirteen colonies, which became now states, adopted their own constitutions. Their main goal was to ensure those “inalienable rights,” the violation of which prompted the colonies to sever relations with Great Britain. Each constitution proclaimed certain general principles that the state government was going to follow. The constitutions of all states provided for the separation of powers into the executive, legislative, and judicial branches, the introduction of a system of checks and balances, in which each branch of government was limited and balanced by the others.

i beleive a. is the only possible answer

this isn't a question and if you're going to list things be kind and use commas.