When does the next update cycle start?

A MirrorView/A mirror has been configured with the ‘End of Last Update’ value set to 15. An update cycle starts at 3:10 pm (15h10) and finishes at 3:30 pm (15h30). When does the next update cycle start?

A.
3:45 pm

B.
3:30 pm

C.
3:40 pm

D.
3:35 pm