Answer:
a) The researcher will not be interacting/intervening with subjects and the data has no identifiers.
Explanation:
The federal definition of human subjects is based in two things:
The IRB needs to determine that a human subjects research meets both of these requirements.
In the case of the example, the data doesn't include any identifiers (therefore there is no identifiable private intervention). Also, the researcher did not participate in the initial collection of the data and since there are no identifiers, he won't be able to interact with the subjects.
That's why the correct answer is a)
NOTE:
b) Is false since the researcher doesn't mention anything about his satisfaction with the data.
c) Is false since the statement itself is false (it says the data has SOME identifiers while the question says the database does not include ANY identifiers)
d) Is clearly false because we already stated that a doesn't meet the requirements.