Identify who and what were investigated and the population of interest. a study found that after a meal, a woman can tell whether a man is married or single by looking at his face. the study involved 40 undergraduate women who were asked to guess the marital status of 80 men based on photos of their face. half of the men were married, and the other half were single. all held similar expressions in the photos. all the women had eaten the same meal at the time of the test. the result was that the closer a woman was to her last meal, the more accurate her guess.
(a) the 40 married men
(b) the 80 men whose faces were used in this study
(c) the 40 undergraduate women
(d) the 40 single men
(e) the researchers in the study
(f) the who is not specified