Comparative advantage I would think. Yep, Google-sensei confirmed it:) Comparative advantage is the answer.
The 2nd one is the correct answer based on the question's topic
Put soap and scrub the fur so the germs go away.
Because it offers the historian an objective snapshot of the public sentiment of the time, which the cartoonist (should be) distilling for their readers, according to their feelings, for mass appeal. I say objective as it is usually very easy to decipher their subjective viewpoint according to the publication. The value of this is that it is tapping into how the masses 'feel' rather than how subjective facts can be built to form historical opinion. It becomes especially valuable prior to this century, when public sentiment is harder to garner as we were less technologically advanced.
D. They secured the U.S. border of the Oregon Territory by negotiating a treaty with England.
