Both syntax and semantics are the branches of linguistics, the former studies the rules governing the combination of words into sentences, the latter studies ______.

A．The duality that characterizes the consciousness of modern Black Americans is so deeply rooted that it cannot be eliminated by political action.
B．African captives who were brought to North America had learned a basic orientation toward the world which remained with them.
C．At the time of the beginning of the United States, white Americans were not aware of the contradiction between the notion of equality and the institution of slavery.
D．The influence of the slavery experience on the West Africans was more powerful than the memory of West African attitudes.

A．magnetism has healing properties
B．people often deceive themselves
C．arthritis is a seasonal thing
D．the mind has an effect on the body’s health