An allusion is a reference to a literary character from a well-known work (for example, Frankenstein, Sherlock Holmes, Biblical characters, etc.). This allows a writer to avoid having to explain all the finer points of his character, by simply pointing the reader to another well-known character. The answer is D.
fails to make a clear claim
Actually, there is a lot of pitfalls in the credibility in this argument. There are a lot of websites in the Internet with information about the so called French Invasion that occurred on the 24th of june, 1812.
The French Invasion is also known in Russia as The Patriotic War of 1812 and in France is known as the Russian Campaign. Try to search under these alternative names and you might find more information.
<h3>Yes it is a run-on sentence</h3>
It's a combination of two sentences. It should be written as:
"Ms. Hartman, an interior designer, asks her clients to fill out a design questionnaire. She uses it to get a sense of their personalities and style preferences."
Where the sentences at though?