A．it expresses the African roots of American culture.
B．in jazz all characteristics of the essence of America come together.
C．individual brilliance outshines the group efforts of the rhythm section.
D．it shows the African culture dominated much of what is American.

A．People’s blood-sugar level is affected by the process of reasoning.
B．Whether people resort to reasoning or intuition may depend on their blood-sugar level.
C．Both reasoning and intuition are certainly affected by people’s blood-sugar level.
D．It is not wise to make important decisions when one is hungry.