Read the text and determine if the sentence is true:

Reward<br>Hillary had poor grades in her math class. Her mother told her she needed to improve her grades. She promised Hillary a trip if she got her grades up. Hillary worked hard and got her grade up to a B. Her mother planned a trip to a local amusement park.

Sentence: hillary was told by other people beside her mother she needed to improve her grades
It's impossible to say