A Questionnaire Contained the Item "Educational Level Completed" and Responses

question 3

Multiple Choice

A questionnaire contained the item "educational level completed" and responses of grade school, junior high school, high school, college, graduate degree, other. A researcher asked subjects to check the appropriate response. The researcher is using this question to measure​

• A) ​direct observables.
• B) ​indirect observables.
• C) ​constructs.
• D) ​a nominal variable.
• E) ​validity.