According to Paragraph 2, which of the following conclusion holds true globally?
选项：

A: Positive feelings and negative feelings have nothing to do with people's health.
B: The connection between positive emotions and good health is weaker in poorer countries.
C: A rich country has a strong conection between positive emotions and good self- reportedhealth.
D: Compared with their food and shelter situation, people's emotions have a much strongercorrelation with their health.