Shawna knows that a correlation between calories of sweeteners consumed and mortality rates among women does not, in itself, mean that drinking more soft drinks will lead to a higher chance of her dying. Which of the following would NOT be a lurking variable in the above scenario? a.) The number of soft drink brands available for purchase b.) Shawna's weight
c.) The time of day Shawna exercises
d.) The amount of caffeine available in soft drinks