The united states adhered to a policy of after world war i.

Isolationism; which is a hands off policy in regard toward Europe. The US wanted to build a "Fortress America" and not get involved in European affairs.

Hope this helps!

The United States adhered to a policy of ISOLATIONISM after world war 1.

But foreign governments retaliated with taxes on American goods.

b) brahmans   is nomadic society

offline recommendation systems option b

because recommendation systems produce a list of two ways

1. through collaborative filtering

or

2. through content-based filtering