Question

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.

Answer 1

In this case, Mila is using a survey
Survey is a data gathering method that directly asked the subjects to filled in the data needed by the researchers.
This method since tend to be really efficient if being done in private manners within the subjects that directly involved with the things that wanted to be examined