The Personnel Director at a Large Company Studied the Eating

Multiple Choice

The personnel director at a large company studied the eating habits of the company's employees.The director watched and recorded whether each employee brought his/her own lunch to work,
Ate at the company cafeteria,or went out to lunch.What method of data collection was used here?

A) Direct observation.
B) An experiment.
C) A survey.
D) A personal interview.