The Manager at George, a Retail Chain, Wants to Monitor

The manager at George, a retail chain, wants to monitor the response of customers to new products launched in George's recently renovated retail store on Yonge Street.He appoints a few staff members to monitor the customers while they shop.The research method being used by the manager is:

A) in-depth interviews.
B) survey research.
C) observation.
D) projective technique.
E) panel research.