Which one of the following is NOT a responsible data recording practice?

Record data consecutively (no skipped pages or spaces),
      dating and initialing each entry.
Correct errors by removing or inserting pages, erasing entries,
      or using whiteout.
Permanently affix additional documentation to notebook pages
      with a signature and date running across both the added
      material and the notebook page.
Institute systematic and robust back-up and archiving procedures
      for data stored digitally, electronically, and/or on computer
      systems