Answer:
A. Historians could explain that the groups live in different areas. ... Historians could explain that the groups had once been at war.
Answer:
a) distribution of the national income among generations will become even more difficult.
Answer:
Case-Control Study
Explanation:
A case–control study is a type of observational study in which two existing groups differing in outcome are identified and compared on the basis of some supposed causal attribute
Answer: Manifestation of a personality trait.
Explanation: Manifestation of personality trait is defined as display or showcasing of the feelings, emotions and thoughts . The positive manifestation of personality feature includes kindness,politeness, generosity etc
According to the question, Olivia is showing her personality traits at different places such as workplace, home , restaurant etc by interacting with everyone, relating with them, polite regards etc.This depicts her behavior of personality trait's manifestation.
