Which sentence from the text shows that Sam is upset with Amir?
A.
The next day, Sam anticipated a hectic schedule but also hoped that his best friend, Amir, would join him for pizza after school.
B.
Back in school, the boys headed to the cafeteria where the cafeteria supervisor told them that no wallet had been found.
C.
By the time the boys left school again, Sam was fuming, imagining that someone had literally picked his pocket.
D.
When the boys reached Sam's house, Sam stomped up the steps to his porch without saying good-bye.