Overall business risk for a particular threat can be expressed as:

A. a product of the probability and magnitude of the impact if a threat successfully exploits a vulnerability.

B. the magnitude of the impact should a threat source successfully exploit the vulnerability.

C. the likelihood of a given threat source exploiting a given vulnerability.

D. the collective judgment of the risk assessment team.

Explanation:

Choice A takes into consideration the likelihood and magnitude of the impact and provides the best measure of the risk to an asset. Choice B provides only the likelihood of a threat exploiting a vulnerability in the asset but does not provide the magnitude of the possible damage to the asset. Similarly, choice C considers only the magnitude of the damage and not the possibility of a threat exploiting a vulnerability. Choice D defines the risk on an arbitrary basis and is not suitable for a scientific risk management process.