Under the articles of confederation, which of the following were true?
a. congress could not tax the states directly.
b. the executive branch of government exercised more power than congress.
c. congress was a unicameral body.
d. states were represented in congress proportionally according to population.

The correct answer are: A. Congress could not tax the states directly. and C. Congress was a unicameral body.  

Explanation:

The Sixteenth Amendment to the Constitution of the United States (Amendment XVI) allows the United States Congress to levy an income tax without apportioning it between the states according to its population or based on the results of a census. This amendment excluded Income Tax from the constitutional requirements of direct taxes, after taxes on income, dividends and interest were classified as direct taxes by the Supreme Court ruling in the Pollock v. Farmers' Loan & Trust Co. (1895). It was ratified in February 1913.

Unicamerality is the practice of having only one camera. Countries with single-chamber assemblies tend to be small and homogeneous and consider the upper house unnecessary.

The unicameralists point out that a high chamber does not make sense in a democracy, but simply dedicates itself to duplicating the existing participation in the lower house. They argue that the functions of an upper house, such as reviewing an approved bill, can be carried out by parliamentary committees.

A. Congress could not tax the states directly.

C. Congress was a unicameral body.

Explanation:

The Articles of Confederation (1781), the first US written Constitution, established a confederacy in which states had sovereignty and independence and the government had few powers that proved to be inefficient to lead the newborn nation.

Under this document, the central government consisted of an unicameral Congress that lacked important enforcement powers such as the power to tax states directly (it could raise money only by asking the states for funds, which had the option to reject the request, by borrowing from foreign governments, or by selling western lands), to draft soldiers and to regulate commerce.