Answer:
She is concerned about her new salary moving her to the next tax bracket because she would be paying more taxes.
Step-by-step explanation:
If her new salary moved her to the next tax bracket she would have to pay more taxes and maybe the amount of money she would have to pay in taxes would exceed the $2,000 per year she would be earning with the raise. So, at the end, she would be earning less than before the raise.