A．All regions have different soils and thus, different cultures.
B．Some regions with similar climates will have similar culture.
C．Cultures in the same area, sharing soil and climate, will be essentially identical.
D．The plants of a country, by being the food of its people, cause the people to have similar views to one another.

A．are the only life forms in Tibet, a large piece of' land
B．are originally found in continental climates
C．are found in land mass that used to be a separate continent
D．have been found in other parts of the Asian continent