The term “era of good feelings” refers to the period of american history when:
a. americans united across party lines to declare war on great britain in the war of 1812.
b. there seemed to be political harmony during the monroe administration.
c. slavery was gradually abolished in all the states.
d. the federalist party was at its strongest.
e. democrats and whigs cooperated to solve the nation’s financial crisis.

b. there seemed to be political harmony during the Monroe administration.

Explanation:

The “Era of Good Feelings” is the term that is used to refer to the period of the term of President James Monroe from 1817 to 1825. 

During this period the country was ruled by the Democratic-Republicans of Monroe party. The term was used because it was a period of stability following the economic problems of the James Madison administration and despite the name, there were a series of problems in the country such as the crisis in slavery with the passage of the Missouri Compromise.

a more perfect union: the creation of the u.s. constitution. the vote was unanimous. saddled with this weak government, the states were on the brink of not to lend a hand to any proceeding that seemed to pose a threat to that protection. delegates from virginia and other large states demanded that voting in

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2. carter: president from 1977 to 1981, carter had controversial poitions over abortion, but yet, he enforce the roe vs wade decision, which had pro-choice content.

3. reagan. for his eloquency and powerful speeches in his mandates, from 1981 to 1989, reagan earned this nickname, “the great communicator” .

4. george h w bush: despite many presidents had important roles in managing and trying to end the cold war, it was in bush sr's mandate that the berlin wall was materially destroyed, and he was visited by gorbachev in the uspresident from 1989 to 1993.

5. clinton: defense of marriage act. clinton signed this controvesial act, which defined marriage and spouses in strict heterosexual perspective, that was later declard unconstitutional by the us supreme court.

6. george w bush: in the begining of his presidency, which lasted until 2009, bush jr faced the greatest terrorist attacks in us and probably the worlds history, in september, 11 of 2001.

7. obama: in attempts to cease a great economical crisis, barack obama signed the controversial recovery act in february 2009, which handled 780-billion dollars.