Susan is a flight attendant for a large airline. She exclusively works a long flight from Chicago to Vienna, and is expected to constantly maintain a positive attitude no matter what situation arises. Over the years, Susan has noticed that when dealing with Americans, their emotions tend to run higher in stressful situations, as opposed to Austrian passengers who tend to be more reserved in stressful or unhappy situations, and she often feels frustrated. Susan's job requires a high amount of

Cheerfulness, positive attitude

Explanation:

Customer service is part of the backbone of business. How customers are treated would determine how long the business would last, when customers are not treated well, there won't be a growth regarding the business, employees would need this in mind considering the various kinds of clients they would come across and it's very obvious they won't be the same, a lot of positive mindedness and cheerfulness is required, this is what is required a lot for Susan's job

which sentences ? that question is incomplete