The Adam's Mark Inn Hotel Chain Is Researching How Well

The Adam's Mark Inn hotel chain is researching how well its hotel staff treats minority guests. It has hired minority couples to pose as guests to monitor the way the hotel staff treats them. After a stay at the hotel, the couple will provide the hotel chain with specific information on their treatment. This sort of information would be gathered during the _____ stage of marketing research.

A) object definition
B) informal investigation
C) situation analysis
D) formal investigation plan
E) data analysis