The Participants in the Crum and Langer Hotel Experiment Were

The participants in the Crum and Langer hotel experiment were not individually assigned to the experimental or control group. Instead, each hotel was randomly assigned to one of the two conditions. What was the reason for this?

A) There was a potential confounding variable because if the housekeeping staff at a particular hotel were assigned to two different conditions, they might talk to each other about what they had been told.
B) The experimenters were trying to avoid the demand cnhataruacral experteristics associment.iat Inecdo wrrecith ret cruiting participants for a
C) The researchers wanted to avoid a potential confounding variable related to practice effects.
D) There was a potential confounding variable because if the housekeeping staff at a particular hotel were assigned to two different conditions there would be intense competition between them to improve productivity at the hotel.