The right answer would be B) Damages from natural disasters.
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The correct answer is cognitive dissonance.
Cognitive dissonance (CD) refers to a state or situation in which a person experiences feelings of discomfort that results from holding two contradictory thoughts, attitudes or beliefs. An instance of cognitive dissonance is the feeling a long-term smoker experiences when he reads an article about an increasing number of deaths due to lung cancer which is heavily caused by smoking.
Let's look at all the options:
A. one of two types—social or working.
-there also also other kinds, for example family relations!
B. usually simple and easy to understand.
-this is not true. If it was true, there wouldn't be any inter-personal conflicts!
C. not influenced by people's ideas and attitudes.
-they are very influenced by people ideas! in fact, the opposite is true!
D. something that must be maintained to stay healthy and strong
-this is the correct answer! if the relations are not maintained, they will fade .
Answer: D. All of the above