Both A and C correctly:
* Execute the script every 2 hours (*/2 or defined 2-hour intervals),
* During May (5 in the month field),
* On Sunday through Tuesday (0-2 or 0-3 where Sunday = 0),
* Targeting /root/update-from-remote-to-local.sh.
The others are either too broad (0-23/2 includes non-target days) or use incorrect ranges.
Reference: CompTIA Linux+ XK0-005 Official Study Guide, Domain 4.0 - System Management
"Cron format: minute hour day-of-month month day-of-week command. Use ranges and intervals to target specific execution times."