Explanation: All risks are determined by risk assessment, regardless whether risks are residual or not.
Incorrect Answers:
A: Determining remaining vulnerabilities after countermeasures are in place says nothing about threats, therefore risk cannot be determined.
B: Transferring all the risks in not relevant to determining residual risk. It is one of the method of risk management.
C: Risk cannot be determined by threat analysis alone, regardless whether it is residual or not.