What parts of the government were not included in the Articles of Confederation? Why?​

On this date, the Continental Congress adopted a plan for the inaugural national government under the Articles of Confederation. Two days later, the Continental Congress sent the Articles to the states, which approved the new government in March 1781. Created to unify the 13 colonies, the Articles nevertheless established a largely decentralized government that vested most power in the states and in the national legislature. Concerned with the accumulation of power in too few hands, the Articles did not establish an executive branch and they greatly circumscribed the role of courts. Even Congress had only those powers “expressly delegated” to it by the states. Delegates gave the Continental Congress the power to request money from the states and make appropriations, regulating the armed forces, appointing civil servants, and declaring war. But the legislature was largely ineffectual because the Articles required more than a simple majority to pass legislation that related to such fundamental issues such as finance, taxation, treaty ratification, and war-making powers. Moreover, attempts to strengthen the Articles required unanimous support of the states. In 1787, the Federal Convention approved the U.S. Constitution which, when ratified by the states, superseded the Articles of Confederation.

no options provided, here,but the answer to this question is often: a historian cites a japanese newspaper article published a year after the end of world war ii in order to draw conclusions about the effect of the war on the japanese economy.

clearly from the answer, the historian alludes to historical sources,and records to aid in analyzing and drawing conclusion on the effect of the war on the economy of japan.