The Master answered, "Never fail to comply. Fan Ch'ih was driving. The Master told him about the interview, saying, "Meng-sun asked me about being filial. I
answered, "Never fail to comply:
Fan Ch'in asked, "What does that mean?
The Master said, 'When your parents are alive, comply with the rites in serving them; when they die, comply with
the rites in burying them; comply with the rites in sacrificing to them.'
Analects 11,5
Which principle of Confucianism does this support?

The constant presence of diseases or infectious agents within a given geographic area or population group. it may also refer to the usual prevalence of a given disease with such area or group. it includes holoendemic and hyperendemic diseases. a holoendemic disease is one for which a high prevalent level of infection begins early in life and affects most of the child population, leading to a state of equilibrium such that the adult population shows evidence of the disease much less commonly than do children (malaria in many communities is a holoendemic disease). a hyperendemic disease is one that is constantly present at a high incidence and/or prevalence rate and affects all groups equally. so probably family history.

  the domino theory states that  if one country in a region came under the influence of communism, then the surrounding countries would follow in a  domino  effect.