Answer:
A fast-food restaurant
Step-by-step explanation:
For ethical reasons, the researcher should not accept money from a fast-food restaurant. It is very possible that after the researcher performs his research, his conclusions are negative for the restaurant. However, if the restaurant funded the research, the researcher might feel pressured to come up with positive results. Moreover, people might question the objectivity of the research if they found out that it was funded by a fast-food restaurant.