A Company That Manufactures Bicycles for Kids Wants to Monitor

A company that manufactures bicycles for kids wants to monitor the reactions of kids when they are taken to the bicycle store.This is done through a closed-circuit camera installed in the bicycle store.Which of the following research methods is being employed by the company?

A) In-depth interviews
B) Experimental research
C) Projective technique
D) Observation
E) Focus groups