What Experimental Result Allowed Kuchta, Krakauer, and Sinervo (2008) to Conclude

What experimental result allowed Kuchta, Krakauer, and Sinervo (2008) to conclude that Ensatina eschscholtzii xanthoptica is a Batesian mimic?

A) It was best able to avoid an attacking predator.
B) It was attacked more often than a toxic newt.
C) Predators became sick after consuming it.
D) Predators avoided it completely.
E) It was attacked less often than another subspecies.