Which act of government was specifically required by the U. S. Constitution? O the levying of a federal income tax
the protection of the natural environment
O the support of struggling businesses
O the establishment of an army and a navy

O the levying of a federal income tax

Explanation:

The Sixteenth Amendment passed in 1913 upheld the right of the United States government to charge a federal income tax. It was further supported by the Revenue Act of 1913. This aspect of the United States Constitution states;

"The Congress shall have power to lay and collect taxes on incomes, from whatever source derived, without apportionment among the several States, and without regard to any census or enumeration."

This is today found in the Internal Revenue code and Title 26 of the United States Constitution. All citizens of the U.S  are expected to pay the federal income tax.

b. major john c. frémont led a rebellion called the bear flag revolt.

explanation:

during the bear flag revolt, from june to july 1846, a small group of american settlers in california rebelled against the mexican government and proclaimed california an independent republic. the republic was short-lived because soon after the bear flag was raised, the u.s. military began occupying california, which went on to join the union in 1850. the bear flag became the official state flag in 1911.

letter a is the answer