Material that is common knowledge select one:

a. must be credited to avoid plagiarism.
b. should only be paraphrased to be ethical.
c. is unlikely to be known by many people.
d. does not require a citation.

d. does not require a citation.

Explanation:

if you know it and you put it in your words and didn't quote or paraphrase from a source, you don't need to cite. if you used the information from a source. always cite.

the boundarys like convergent divergent and transform it causes subduction

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the correct answer is :

{b.}   ( american workers lose job opportunities )

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    -sprinkles