Final answer:
The job opening would be best filled by a knowledge worker, who possesses the ability to use analytical reasoning and generate new ideas to address customer service issues.
Step-by-step explanation:
The job opening for someone who has the ability to use analytical reasoning and relevant judgment to address customer service issues, as well as generate new ideas, would be best filled by a knowledge worker. Knowledge workers are individuals who possess specialized abilities and training to perform tasks that require analytical thinking and problem-solving. They often work autonomously and can generate innovative ideas to improve customer service.