Question

al-qaedas main targets on september 11, 2001, were○ boston, pennsylvania, and new york city.○ pennsylvania and washington, dc.○ new york city and washington, dc.○ boston, new york city, and washington, dc.

Explanation:

The 9/11 attacks targeted the World Trade Center in New York City, the Pentagon in Washington, DC, and a fourth plane crashed in Pennsylvania (a secondary outcome, not an intended target city). Boston was the departure point for two hijacked planes, not a target.

Answer:

New York City and Washington, DC.