Sentence1: Keri was babysitting her niece on a weekday. Sentence2: She needed to put her to sleep early. Sentence3: Unfortunately the niece had too much energy. Sentence4: Keri convinced her to do exercises with her. 
 (A) Then Keri took the child for  a  walk  to tire her out. (B) Keri convinced the waiter that he had overcharged  her.
B