题目选项分析

The Indonesian mimic octopus is able to camouflage itself from predators by blending into the background. Sometimes, though, even when a predator is nearby, the mimic octopus takes on a color pattern that is not present in the immediate environment. A marine biologist of cephalopods claims that this behavior is a sign of an octopus engaging in play, meaning that the behavior does not confer any specific advantage.

Which of the following, if true, would most call in to doubt the marine biologist's claim?

【选项】An observational study that tracked a mimic octopus over the course of a week found that it changed the color of its skin even when there were no predators in the area.