If a questionnaire says "Small college classes are better places to learn effectively: (choose) 1__ Strongly disagree, 2 __ Disagree, 3__ Neither agree nor disagree, 4__ Agree, 5__ Strongly agree," the researcher would be using which of the following to discover data.
a. Likert scale
b. Semantic differential
c. Multiple choice
d. Thematic Appreciation Test (TAT)
e. Dichotomous question
Answer: a