Answer:
Both A and B
Explanation:
This is because both metal rods work similar and have similar power, a fractured rod can not use one hundred per cent of it's maximum power and a powdered metal rod is way less powerful than a forged rod and it's simply impossible for the people to compare both rod's power.
I believe the correct answer is security needs.
According to Maslow's hierarchy of needs, a theory
in psychology proposed by Abraham Maslow in 1943, the need to protect oneself
from physical and economic harm is related to security needs. Security needs
also include security of environment, employment, resources and health.
D. Regular river flooding