Final answer:
The correct answer to which of the following describes the Railway Labor Act of 1926 is option C, as it established the rights of most workers to engage in collective bargaining within the railway industry.
Step-by-step explanation:
The Railway Labor Act of 1926 is described by one of the options provided in the question. This act established the rights of most workers to take part in collective bargaining, thus the correct answer is option C. This piece of legislation ensured that railway workers could organize and negotiate agreements with their employers regarding wages, hours, and other working conditions. It sought to avoid any potential disruptions to commerce or transport by encouraging the amicable settlement of disputes between railroad companies and their employees.