ANSWER: (D) or aka the 4th option
EXPLANATION:
On September 11, 2001, 19 militants associated with the Islamic extremist group al Qaeda hijacked four airplanes and carried out su**ide attacks against targets in the United States.
You can also look it up online for more details.
they were both Greek city-states that had many rulers in governers
behavior observation scale
Behavioral observation is a generally utilized arrangement of behavioral evaluation. In comparison to different methods of behavioral evaluation, the people rely on people's perceptions of performance, behavioral observation includes observing and documenting the performance of a person in common circumstances. A behavior observation scale (BOS) is an assessment process which regulates behavior upon levels of achievement and also estimates the frequency with which the responses happen. The devices of BOS are ordinal scale applications which generally rates on a 1-5 or 1-7 scale.