It is quite common for an invention to be made independently by
A.a few persons
B.several persons
C.one person only
A.a few persons
B.several persons
C.one person only
A.turned sour
B.became delicious
C.became sweet
A.deviants
B.same
C.None of these
A.Vilfredo Pareto
B.Alvin Toffler
C.Karl Marx
A.Research
B.Scientific experiment
C.Diffusion
D.Analysis
A.short-term trial
B.long-term trial
C.trial
A.what the invention does
B.working of object
C.changing in object
A.change in social structure.
B.change in social relationship.
C.change in the culture of a society.
D.None of these
A.150 social changes
B.170 social changes
C.100 social changes
A.existing patterns
B.developing patterns
C.None of these