A Glass of Wine a Day Is Often Said to Be

Multiple Choice

A glass of wine a day is often said to be beneficial to the health and well being of women over 55 years old. Suppose that a study is done which has 2000 participants. Half of the participants are women Who are over 55 years old who drink between one and two glasses of expensive wine each day, while The other half of the participants are women who are over 55 years old who do not drink wine. The Researchers find that after two months of monitoring these women, the group that drinks wine on aDaily basis has significantly fewer health problems than the other group. What variable is most likely Confounding the results of this study?

A) age of the participants
B) gender of the participants
C) socio-economic status
D) placebo effect
E) None of the above.