Question: Within these disciplines, researchers have defined the case study and discussed its critical elements in a variety of ways.
Researchers have analyzed the case study within those fields.

Answer: yes

Question: Tuppence opened the door of an empty first-class compartment, and the two girls sank down breathless on the padded seats.
There were two girls sitting on padded seats.

Answer: yes

Question: As a basis for approving TA data, supervisors are required to obtain reasonable assurance that employees working at remote sites are working when scheduled and that T&A information accurately reflects time worked and absences from scheduled tours of duty.
supervisors aren't required to obtain reasonable assurance that employees working at remote sites are working when scheduled

Answer:
no