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Arrowheads and spearheads are some of the most familiar objects made by Native Americans.

Explanation:

This one is the example of objective writing, the sentence states "Most familiar", words like that emphasize it's someone opinion and not an actual fact. Therefore it is the objective sentence.

explanation:

it's important for any number of settings.   but then i'm a retired teacher and my view may be biased.

it certainly will not weigh as a minus when applying to a college, while poor grades always work against you.

other factors are important like what you do to improve the community.  

the answer is a)   a sentence of death costs the state "almost three times as much as a sentence of life in prison" (delon 147)