Answer:
Talking Negatively about herself
Explanation:
When being bullied you'll let what the bullies are saying get to you, it'll hurt your feelings and you'll eventually start believing it.
A. Would be the answer I chose.
It said one of the following WORKOUT CHANGES, so I'm assuming that it doesn't want you to just stop. Different shoes may provide better support, bringing relief to the knees and allowing you to continue your walking workout.