A help desk technician receives many similar tickets about slow application performance after a recent update. According to ITSM best practice, what should happen next, beyond resolving each individual ticket?

A Ignore the pattern, since each ticket is technically a separate request B Immediately roll back every recent change across all systems without investigation C Close all the tickets without responding, since they are duplicates D Log a problem record to investigate the underlying root cause linking the recurring incidents, in addition to resolving each ticket