Which was not a problem with the Articles of Confederation? A)no national currency
B)enforce laws
C)no national court system
D)could notestablish a strong army

answer; curiosity;

answer; exploratory;

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