Which of the following terms is mismatched with its example?
a. Bias- Cases tend to have a better recall on past exposures than controls
b. Bias- Spring balance shows variation in measurement due to fluctuations in room temperature
c. Confounding- Study evaluating association between exposure and outcome is skewed by third variable that predicts outcome and is also associated with the exposure
d. Random Error- You measure the mass of a ring three times using the same balance and get slightly different values