Explanation
Correct answer: C.
Choice C is the best answer. "Indeed" logically signals that the description of the art installation in this sentence—its blue room and preening unicorn that leave visitors "dazzled and confused"—offers additional emphasis in support of the previous sentence’s claim about the installation’s "whimsical yet perplexing experience."
Why the other choices are wrong
Choice A
Choice A is incorrect because "second" illogically signals that the description in this sentence is a second, separate claim from the previous sentence’s claim about the installation’s "whimsical yet perplexing experience." Instead, the specific details describing the installation emphasize and support the previous claim.
Choice B
Choice B is incorrect because "instead" illogically signals that the description in this sentence is an alternative to the previous sentence’s claim about the installation’s "whimsical yet perplexing experience." Rather, the specific details describing the installation emphasize and support that claim.
Choice D
Choice D is incorrect because "nevertheless" illogically signals that the description in this sentence is true despite the previous sentence’s claim about the installation’s "whimsical yet perplexing experience." Instead, the specific details describing the installation emphasize and support that claim.