Describe third parties in American politics. Why has there never been a party system of three or more parties in the United States? How do third parties arise? Describe some notable third-party candidates for president.

answer; longitudinal;

answer; mission;

answer; the above statement is (true);

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