Which are accurate statements about the events of september 11, 2001? choose all answers that are correct. a. osama bin laden and al-qaeda denied playing any role in the attacks. b. the cities of new york and washington, d. c. were targeted by terrorists. c. the terrorists who carried out the attacks blamed the united states for serious problems in the muslim world. d. saddam hussein and iraq assisted al-qaeda in the terrorist attacks.

What is the main difference between primary and secondary sources? a. primary sources are historical documents, and secondary sources are modern-day documents. b. primary sources are derived from museums and archives, and secondary sources are created by history students and academics. c. primary sources are found in ancient places with a rich history, and secondary sources are found in historical journals and blogs. d. primary sources are created during a particular historical era, and secondary sources are created by studying primary sources.