Question

Which factor most influenced cultural change in South America during the 20th century?

Group of answer choices

Spread of European diseases

Collapse of ancient civilizations

Expansion of river trade

Improvement in communication technology

Answer 1

Improvement in communication technology.

Reason: In the 20th century radio, film, television, telephones and later mass media and the internet rapidly spread ideas, news, music and consumer culture across South America, accelerating urbanization, nationalist movements and cultural homogenization. The other options (European diseases, collapse of ancient civilizations) refer to much earlier periods, and expansion of river trade had far less broad cultural impact than mass communications.