According to Karl Marx, social change results from the efforts of <span>the powerless to gain power. The correct option among all the options that are given in the question is the first option or option "a". I hope that this is the answer that you were looking for and it has actually come to your help.</span>
Domesticating animals learned it freshman year
The morale of the Continental army often was very low, especially during the 6 month stay at Valley Forge. They were often low on food, clothing, ammunition, & were fighting against a very powerful nation, England. Many men died because of hunger, illness, cold & disease.
I think that the key point here is the "easily reproducible" - because all of them can be scientific questions (even a! it could tell us about about the human psyche!)
but d. is the best answer for a reproducible experiment. B could also make a good experiment, but it would be too expensive to be easily reproducible. C is calling for a more complex analysis that is too complex for an experiment. And a would require more questionnaires than experiments
