Which of These Best Describes an Example of Usability

Which of these best describes an example of usability?

A) The IT department is surveying your unit to determine the placement of new computer workstations.
B) A researcher is conducting a study of how nurses interact with electronic documentation to organize care handoffs.
C) The leadership in your institution is asking for your help to determine oncology patient flow across regional institutions.
D) The administration has asked you to take responsibility for orientation of new hires and the retraining of selected current employees on use of the automated medication administration system because there have been a consistent number of user errors.