Determine whether the description below corresponds to an observational study or an experiment. in a studysponsored by a company, 14 comma 991people were asked what contributes most to their happiness commaand 16 %of the respondents said that it was their health. is the study described above an observational study or an experiment? a. the study is an observational study because the survey subjects were not given any treatment. b.the study is an observational study because the responses of the survey subjects were observed. c.the study is an experiment because it was done with statistical methods. d.the study is an experiment because the survey subjects were given a treatment.