Final answer:
Cheerfulness is the attribute that involves exhibiting a positive attitude to coworkers, patients, residents, and visitors. Being optimistic at work contributes to career success and is valued by employers.
Step-by-step explanation:
The attribute of Cheerfulness is about exhibiting a positive attitude to coworkers, patients, residents, and visitors. Being optimistic at work contributes to career success and is valued by employers, who also look for candidates with a positive attitude, adaptability, reliability, and the ability to work well with others.