What must dogs achieve in each exercise to qualify in CD?

To qualify in the Companion Dog (CD) category, dogs need to demonstrate a proficiency level that reflects their competence in each exercise. The requirement of achieving better than 50% in each exercise sets a baseline standard that indicates a dog's ability to perform the tasks adequately. This threshold ensures that the performance is more than just average, showing that the dog understands the commands and can respond correctly in a variety of situations.

The other options suggest either a lower or a higher standard. A performance of better than 30% would not effectively gauge the dog’s capabilities, allowing for too great a margin of error. A requirement of better than 70% or a perfect score sets an unrealistically high bar that may not be necessary for the qualification process, especially considering that the purpose of the CD category is to assess basic obedience rather than perfection. Thus, the 50% criterion strikes a balance between demonstrating skill and allowing for minor imperfections in execution.