18. What are some examples of incentives? a. Getting a degree, passing drivers test
b. Petting a dog
c. Baring witness to a crime
d. Feeding your pet

the article must be ratified by three-fourths (38) of states within a proscribed deadline.

source:

it might look like that the ideal way to research the health effects of trans fats is through a controlled experimental feeding trial. but these kinds of trial have several important limitations that the researcher must look into:

short in duration (this factor usually checks up on the intermediary risk factors rather than the actual outcomes of the disease)

limited dietary changes

only makes use of healthy participants