Determine whether the study depicts an observational study or an experiment. Upper A poll is conducted by a school's math department in which tenth dash grade students are asked if they prefer to be in their math class or their English class. nothing Choose the correct description of the study.

A. The study is an observational study because the researchers control one variable to determine the effect on the response variable.
B. The study is an observational study because the study examines individuals in a sample comma but does not try to influence the response variable.
C. The study is an experiment because the researchers control one variable to determine the effect on the response variable.
D. The study is an experiment because the study examines individuals in a sample, but does not try to influence the variable of interest.

Observational studies are studies in which the researchers try to observe the effect of a diagnostic test, treatment, and risk factor without making any change in who is exposed to it and vice-versa. In the observational study, the researcher collect data based on what is heard and seen. In the observational study, the researcher has no control over the variables.

There are three types of observational studies:

1. Case-control studies

2. Cohort studies

3. Cross-sectional studies.