The period in world history known as "the crusades" represents a struggle mostly based on

e. all of em

~courtney

offline recommendation systems option b

because recommendation systems produce a list of two ways

1. through collaborative filtering

or

2. through content-based filtering

a variant spelling of the word dote (british)

there are many answers to this question, such as a diplomat, ambassador, soldier, united nations employee, cia, etc.