Which action is a required response to an identified residual risk?

Clause 6.1.3 (e) specifies:

“The organization shall obtain risk owners’ approval of the information security risk treatment plan and acceptance of the residual information security risks.”

This confirms that residual risks — those remaining after risk treatment — must be reviewed and formally accepted by the designated risk owner. Option A is incorrect; awareness training is not a default control for all residual risks. Option B misrepresents leadership responsibility; top management ensures processes exist, butrisk ownersformally approve residual risk. Option D (avoiding risk) is a treatment option, not the mandated requirement for residual risks.

Thus, the required response isC: Review and acceptance by the risk owner.