According to Bloomfield, meaning can be defined in terms of observable stimuli and responses made by participants in specific situations. This view of meaning is known as ______.

A．the revival of some North American and European CBDs
B．the problems facing the development of U.S. downtown areas
C．the moving pattern of the U.S. middle class
D．the possible solutions to the fiscal problems

A．lack of industriousness
B．poor education
C．financial problems
D．negative attitude toward work