In a 2003 study by Bertrand and Mullainathan to measure racial discrimination in the labor market, experimenters sent fictitious resumes to help-wanted ads in Boston and Chicago newspapers. To manipulate perception of race each resume was assigned either a very African American-sounding name or a very White sounding name. They then measured the response to the resumes. Which of the following is a correct statement about this study? Bertrand, M., and Mullainathan, S. "Are Emily and Greg More Employable than Lakisha and Jamal?" Working Paper 9873, National Bureau of Economic Research, 2003. http://www.nber.org/papers/w9873.pdf O It was not a blind study because there was no placebo. O It was not a blind study because the experimenters knew where they were sending the resumes. It was a blind study because those who received the resumes did not know the treatment they received. O It was problematic because the subjects didn't even know they were in an experiment