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 amount of caffeine available in soft drinks
• B.)
• Shawna's weight
• C.)
• The time of day Shawna exercises
• D.)
• The number of soft drink brands available for purchase