Answer:
d. participant observation
Explanation:
Based on the scenario being described it can be said that in this situation Mary is using participant observation as a method of gathering data. This is a research method where the researcher (in this case Mary) observes the participants of the study but also engages with them in order to better gather more detailed information. Such as Mary has done by also volunteering in order to gather data on the other women.
well just to let you know ''HINT'' OPEC is oil.
Answer c supremacy clause
Answer:
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Pianissimo, mezzo piano, and piano
