Which statements about the events of september 11, 2001 are true? choose all answers that are correct.
a. a hijacked airliner was flown into the u. s. capitol building in washington, d. c.
b. the terrorists who carried out the attacks claimed that killing american civilians was justified.
c. passengers on three of the four hijacked planes managed to overpower the terrorists.
d. osama bin laden and al-qaeda planned and carried out the attacks on the united states.

b. The terrorists who carried out the attacks claimed that killing American civilians was justified.

d. Osama bin Laden and al-Qaeda planned and carried out the attacks on the United States.

Explanation:

The attacks of September 11, 2001 were a series of four attacks committed on the morning of Tuesday, September 11, 2001, by 19 members of the al Qaeda jihad network, by hijacking commercial aircraft to be hit against various targets, causing the death of 3016 people (including the 19 terrorists and the 24 disappeared) and leaving more than 6000 injured, as well as the destruction in New York of the entire complex of World Trade Center buildings (including the Twin Towers) and serious damage in the Pentagon building (headquarters of the Department of Defense of the United States, in the state of Virginia), episode that would precede the war in Afghanistan and the adoption by the US government and its allies of the policy called "war on terrorism" »

the answer is c my brotha. c.   formed an alliance with the soviet union.

the monroe doctrine is the best known u.s. policy toward the western hemisphere. buried in a routine annual message delivered to congress by president james monroe in december 1823, the doctrine warns european nations that the united states would not tolerate further colonization or puppet monarchs.