It's A. Because a simile is a fugue of speech involving the comparison of one thing to another thing of a different kind.
The statement, which effectively uses a quotation to show Swift claim is this: SWIFT WRITES THAT 'THE POORER TENANTS WILL HAVE SOMETHING VALUABLE OF THEIR OWN' THAT CAN 'HELP TO PAY THEIR LANDLORD'S RENT.'
Quotation marks are used in write ups to indicate direct speech or texts; that is, quotation mark is used when an author wants to use the words of another person in his write up. When one is quoting a complete sentence, the first letter of the quoted word has to be capitalized, but when on is quoting a fragment, smaller letters will be used.