Henrietta participates in a research study that examines the effectiveness of a new anti-anxiety drug. She is given 10 mg of the drug, and her anxiety levels are later measured. Henrietta is part of the .

She is part of the research for  the new drug

Explanation: She was used as a  specimen to test the effectiveness of  the drug before it is been released to the public.

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not  

cuba  

russia  

iraq  

el salvador  

explanation:

known as the land of volcanoes, el salvador has visit seismic tremors and volcanic movement. it is the main nation in central america that does not have a coastline on the caribbean sea. about portion of all salvadorans live in the wide open. they are poor and don't have power or running water in their homes. in 1525, pedro de alvarado, a lieutenant of cortés's, vanquished el salvador. el salvador, with alternate nations of central america, pronounced its freedom from spain on sept. 15, 1821, and was a piece of a league of central american states until the point when that association broke up in 1838.