I'm pretty sure the answer is D. Inconsistently collected data.
How often you smoke and what age you start certainly do play a role in your health, as well as the depth of inhalation. And if you have other things in your lifestyle that might be risky, then that will make you more likely to be unhealthy.
Because Jennifer had to boil and stew the peaches, the enzymes in the peaches will have denatured. This is because once the enzymes reach a boiling point they start to change and become less-effective.
