Example $2$: A hospital lab has one MRI, and $5$ patients need scheduling. Recall Example $2$ in MRP lecture slides. If the patients are sequenced in an order based on EDD rule, what is the job tardiness for patient C$?$

A$.1$

B$.0$

C$.1$

D$.9$

Answer Key:B

Please show why it's $0,$ I keep getting $-1.$