A. Geographic location
B. Specific size of population
C. Specific density of population
D. Diversification of occupations

A. A person
B. Type of attitude
C. Mid of the way
D. population

A. Loss of humanistic value
B. Impersonal relationship
C. informal relationship
D. Competition

A. population size
B. population density
C. population heterogeneity
D. All of the above

A. Singapore seaport
B. Settle seaport
C. Rotterdam seaport
D. None of these

A. internal validity
B. face validty
C. reliability
D. external validity

A. 15.8%
B. 11.8%
C. 10.8%
D. 15.4%

A. Indai
B. Bhutan
C. South Africa
D. China

A. Dollar
B. Dirham
C. Peso
D. Pound