What is the best way to punctuate the bolded portion of the sentence?

the new york timescalled vonnegut a “laughing prophet of doom

“laughing prophet of doom.
“laughing prophet of doom”
“laughing prophet of doom.”
“laughing prophet of doom

Which best compares the authors’ purposes in silent spring and “save the redwoods”? both authors want readers to protect human rights. both authors want readers to focus on saving trees. both authors intend to entertain readers with their essays. both authors intend to convince readers of their viewpoint.