Explanation
Correct answer: D.
Choice D is the best answer. “By contrast” logically signals that the information in this sentence—that one of de la Paz’s poems subverts sonnet conventions—contrasts with the previous information that his poems often adhere to sonnet conventions.
Why the other choices are wrong
Choice A
Choice A is incorrect because “fittingly” illogically signals that the information in this sentence is an appropriate or expected outcome of the previous information about de la Paz’s adherence to sonnet conventions. Instead, de la Paz’s subversion of sonnet conventions contrasts with that information.
Choice B
Choice B is incorrect because “similarly” illogically signals that the information in this sentence is similar to the previous information about de la Paz’s adherence to sonnet conventions. Instead, de la Paz’s subversion of sonnet conventions contrasts with that information.
Choice C
Choice C is incorrect because “for example” illogically signals that the information in this sentence exemplifies the previous information about de la Paz’s adherence to sonnet conventions. Instead, de la Paz’s subversion of sonnet conventions contrasts with that information.