Due to operational commitments， a system has a very short backup window during the week， but is not used from Saturday morning through Sunday at Midnight. Which of the following minimizes backup time， while providing the best data restore coverage？（）

• A、Full backups every night
• B、Differential backups every night
• C、Full backup Saturday night， incremental backups the rest of the week
• D、Full backup Saturday night， differential backups the rest of the week