Answer:
Assuming this is the image you're looking at then your answer is 4
Explanation:
<u>Joy's Schedule</u>
We are told that Joy can work any day either Sarah or Violet are scheduled.
Sarah is scheduled to work on Tuesday, Thursday, Saturday, and Sunday.
Violet is scheduled to work on Monday, Tuesday, Wednesday, and Thursday.
So, between Sarah and Violet's work schedule, Joy can be called on any day of the week.
<u>Nancy's Schedule</u>
It is given that Nancy can work any day either Nathan or Joy are scheduled.
Nathan is scheduled to work on Monday, Wednesday, and Friday.
Joy is scheduled to work on any day of the week.
So, Nancy can also be scheduled to work on any day,
Therefore, the correct option is 4. Joy and Nancy.