How does the federal government influence cities' environmental policies?
O
A. It increases federal taxes on cities with strict environmental rules.
O
B. It monitors levels of environmental damaggaffecting cities.
O
C. It places extra regulations on cities adopting smart growth plans.
O
D. It takes over cities that fail to protect the environment.

It places extra regulations on cities adopting smart growth plans by this  the federal government influence cities environmental policies.

Explanation:

- "schenck v. united states, case in which the u.s. supreme court ruled on march 3, 1919, that the freedom of speech protection afforded in the u.s. constitution's first amendment could be restricted if the words spoken or printed represented to society a “clear and present danger.” "

- speech aimed to potentially create danger could be banned.

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offline recommendation systems option b

because recommendation systems produce a list of two ways

1. through collaborative filtering

or

2. through content-based filtering