Answer:
Advanced persistent threat.
Explanation:
Advanced persistent threat is a threat actor implemented by either a government supported or private group to intrude a network or system and stays undetected, collecting information over a period of time.
It is used by cyber terrorist group to facilitate massive attacks based on the information retrieved. National or government group use the concept to promote national security.
This would be a mentor-D. They role is to mentor or guide you with advice or assistance. A role model is a similar answer in that they respect you, but they might not offer advice or assistance which makes it incorrect.
If you mean sonar it uses echolocation but GPS is signaled from satellite to the internal antenna
This is definitely an opinion, but an excel you can do A and D and just about the same as B also
<u>So i'd say C </u>
