What is required to minimize the damage from a newly detected incident?

The correct answer is A. early containment.

Early containment is crucial in minimizing damage from a newly detected incident as it involves taking immediate actions to stop the incident from escalating. This can include isolating affected systems, deploying response teams, and implementing temporary measures to prevent further harm. While appointing a Major Incident Manager and reporting to law enforcement are important steps, they are usually part of the broader incident management process that follows initial containment.