hi friends

I want answer and solution from you! i know the answer , but not the solution!(i read it in a magazine)


Joan doesn't like to be late, so she sets her watch ahead by 7 minutes. When she travels from Los Angeles to Chicago, she forgets to adjust her watch. In addition, her watch stops for a full 23 minutes before she notices. By how many minutes is her watch off?

A. 90
B. 104
C. 120
D. 136

bye