Question

a used trolleys and subways.
b worked on farms and in rural areas.
c moved to urban areas.
d moved to suburban areas.

Explanation:

To solve this, we analyze the options in the context of historical population movements (likely related to urbanization trends).

• Option A: Using trolleys/subways is about transportation, not population movement direction. Eliminate.
• Option B: Working on farms/rural areas is about employment, not movement away from rural. Eliminate.
• Option C: Moving to urban areas aligns with urbanization (people leaving rural for cities).
• Option D: Moving to suburban areas is a later trend (suburbanization), not the primary early movement.

Answer:

C. moved to urban areas.