What role do judges play in cavy competitions?

Judges in cavy competitions have a critical role that extends beyond merely checking for health issues. Their primary responsibility is to evaluate cavies based on established breed standards, which include assessing the physical characteristics, condition, and overall appearance of the animals. This evaluation then contributes to the overall ranking in the competition. Additionally, judges also assess the showmanship skills of the exhibitors, which encompasses how well the exhibitors handle and present their cavies. This dual focus on both the animal and the exhibitor's presentation is what makes option B the right choice, as it captures the full scope of what judges are tasked with during cavy competitions.

Other choices do not fully encompass the essential functions of judges in cavy shows; they may participate in various aspects of the competition, but their primary role remains comprehensive evaluation based on standards and skills.