In 200 years, after watching our tv commercials and internet advertising, it is possible that researchers will conclude that we had all sorts of medical problems and only ate food in our cars. these conclusions would be based on research.
a. ethnographic
b. experimental
c. correlational
d. archival

d. archival

Explanation:

According to my research on different research methods, I can say that based on the information provided within the question these conclusions would be based on archival research. This is a research method in which the researchers analyze different sources that contain historical data and are archived, these sources include documents, records, objects, sound and audiovisual materials, or other materials.

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think its caste system

explanation:

the branch of biology that deals with the normal functions of living organisms and their parts.

the way in which a living organism or bodily part functions.