They conquered egypt and ruled them for many year

It depends on the time period this is mentioned, but the earliest conqueror of Egypt was Mesopotamia. sorry if it's not in the time period you want!!

answer: choose the second bullet point. it is the easiest to put together an answer to the question.

explanation:

offline recommendation systems option b

because recommendation systems produce a list of two ways

1. through collaborative filtering

or

2. through content-based filtering