In Trial 18 of a Sentence-Verification Task, Participants See the Sentence

In Trial 18 of a sentence-verification task, participants see the sentence, "A robin is a bird." In Trial 42 they see, "A penguin is a bird." According to prototype theory, we should expect faster responses to

A) "robin" because participants more readily see the resemblance between "robin" and the bird prototype.
B) "penguin" because penguins are a unique bird and thus easily identified.
C) "robin" because of response priming.
D) "penguin" because penguins are higher in typicality.