Question

nico wanted to determine the number of students in his school who buy school lunch. he walked around the cafeteria one lunch period looking to see whether every fifth person in the cafeteria purchased lunch or brought their own. which method did he use to collect his data? survey simulation experiment observational study

Explanation:

Nico is observing a characteristic (buying lunch or bringing own) of every fifth person in the cafeteria without interfering or manipulating variables. This is an observational study. A survey involves asking questions, a simulation creates a model of a situation, and an experiment involves manipulating variables to observe effects.

Answer:

D. observational study