Final Answer:
IATTs (Interim Authority to Test) should be granted solely when operational environments or live data are necessary to fulfill specific test objectives and must expire upon completion of testing.
Step-by-step explanation:
IATTs are temporary authorizations granted for testing purposes in the context of information systems or software development. They provide a limited and controlled access to operational environments or live data. The statement emphasizes the importance of IATTs being issued only when necessary for specific testing objectives. This aligns with security best practices to minimize potential risks associated with accessing live environments. Furthermore, the requirement for expiration at the completion of testing ensures that access privileges are only granted for the duration needed, enhancing overall security and compliance.
Option A is the answer.