Mila, a school principal, wants to know her students’ opinions about the food served in the school’s cafeteria. To obtain her students’ opinions, she devises a set of questions that she asks all her students to answer. In this case, Mila is using a to obtain the opinions of her students.a. longitudinal
b. double-blind
c. survey
d. case study

c. survey

Explanation:A survey refers to a type of research which gathers information data using questionnare which are direct questions to the participants that they will need to answer either in person or through email or telephone. Surveys are like self report data gather d from participants because it is uaulkyfo used on finding people opinions and beliefs concerning that issue of interest.

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