Which attack scenaio represents the most frightening of all the attack scenarios against medical devices?

$1.$

Denial of Service attack scenario represents the most frightening of all the attack scenarios against medical devices.

$2.$

Therapy manipulation attack scenario represents the most frightening of all the attack scenarios against medical devices.

$3.$

Patient data theft attack scenario represents the most frightening of all the attack scenarios against medical devices.

$4.$

Asset damage attack scenario represents the most frightening of all the attack scenarios against medical devices.