Which is an example of an act of civil disobedience?

Some of the most common forms of civil disobedience are an illegal boycott, refusal to pay taxes, picketing, draft-dodging, denial of services, strikes, and sit-ins. non-co-operation. Non-cooperation with government, institutions make it difficult for them to function.

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

you didn't list the options. however, a few communist countries today are: the people's republic of china, north korea, and cuba.