A researcher wants to see whether she can make the typical administrative assistant job more motivating at Acme, Inc. To experimentally investigate this possibility, she randomly assigns administrative assistants to one of the following conditions: doing the job as it has always been done, having a computer performance monitoring device installed, receiving feedback about their performance on a weekly basis, or being given a say in how one's workload is structured and done. Which of the preceding conditions is an example of a control group?

ABeing given a say in how one's workload is structured and done

BDoing the job as it has always been done

CHaving a computer performance monitoring device installed

DReceiving feedback on a weekly basis