If I recall correctly from my World History days, then it is D.
The answer is: c. It’s important to keep accurate records.
In cases when the people from authority need to conduct an audit to our financial information, they will crosschecks the accounting records that we have with the actual proof of the transaction (slips, bank statement, cheques, etc). If, there are some inaccuracies in the records, they could use it as a proof to indict us for financial frauds even if it's a honest mistake on our part.
There are multiple possible answers. One is that it's mouse droppings since mice like to eat it. Another is that it's bugs and this is dangerous since they can leave larva there. The third is that they are remaining residue traces from other types of oats that were ground together and in this case it is not that dangerous.
Honestly, I think the United States would eventually look the same as it does now. If they had not bought the land, they likely would have gone to war for it. It is very unlikely that they would have let it stay there as part of France or an independent country, both because of Manifest Destiny and for national security.
