A) If this is set to Yes, student will have to press a submit button to mark their assignment as final, allowing them to keep a draft version on the system.
B) Never: The student submission can never be reopened for new submission
Manually: The student submission can be reopened by a teacher
Automatically until pass: The student submission will automatically reopen until they achieve the pass grade.
C) The maximum number of attempts that a student can make on a submission, this may be used if option B is set to Manually, or Automatically until pass.