20. _helped industrial workers to gain collective bargaining power. A. Urbanization B. Unionization C. Modernization D. Collectivism

The answer is B. Unionization.

Step 1: Understand the question. The question is asking which of the given options helped industrial workers to gain collective bargaining power.

Step 2: Define key terms. Collective bargaining power refers to the power that a group of workers gain when they join together to negotiate with their employer about working conditions, pay, hours, etc.

Step 3: Evaluate the options.

A. Urbanization refers to the process of making an area more urban, which typically involves the growth of cities. This doesn't directly relate to collective bargaining power.

B. Unionization refers to the process of organizing workers into a union. Unions are organizations that represent the interests of workers and negotiate with employers on their behalf. This directly relates to collective bargaining power.

C. Modernization refers to the process of adopting new, more advanced methods, ideas, or products. This doesn't directly relate to collective bargaining power.

D. Collectivism is a social theory favoring collective action and ownership, but it doesn't directly relate to the process of gaining collective bargaining power.

Step 4: Choose the best answer. Based on the definitions and evaluations of the options, the best answer is B. Unionization.