Sentence 1: Sheila worked for a customer care center, and hated her job. 
 Sentence 3: But one day she was in a great mood, as she'd won $200 recently 
 Sentence 4:  She thought her mood would last, but her first customer was a jerk 
 Sentence 5:  She resigned herself to another bad day at work 
 Option 1: While some customers were nice, most were downright nasty. 
 Option 2: The customers were nasty to her, so she always hid behind the counter and made her other co-workers deal with them.