Who is Helen of Troy, and how has she been portrayed throughout history? Do you think that has changed?

offline recommendation systems option b

because recommendation systems produce a list of two ways

1. through collaborative filtering

or

2. through content-based filtering

after the roman empire, the catholic church began to unify by taking on many duties of a government.

small european communities with shared traditions consolidated into large new states (apex)

confedracy

supported slavery

upheld the supremacy of federal laws

believed states should be able to nullify federal laws

union

wanted to abolish slavery

supported high tariffs

upheld the supremacy of federal laws