Terrorist attacks by extremist groups have occurred
almost entirely in the united states
almost entirely in the middle east
in few countries limited to north america
in multiple countries all over the world

in multiple countries all over the world.

Explanation:

Terrorist attacks by extremist groups have occurred in multiple countries all over the world. In the last few years in particular, there has been a rise in the number of terrorist attacks perpetrated all over the world. Islamic terrorism is the one most closely associated with this trend, and this ideology has led to attacks in the Middle East, the United States and Europe. However, other types of extremist ideologies have also been responsible for attacks, such as extremist Christian groups in the United States.

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