Answer: E) Many people who work for manufacturing plants live in areas in which the manufacturing plant is the only source of employment.
Step-by-step explanation:
The scenario that'll make the labor union accept Richard's suggestion to lower the wages is when many people who work for manufacturing plants live in areas in which the manufacturing plant is the only source of employment.
The reduction in wages by Xanadu Industries wouldn't bring about loss.of workers as the manufacturing plant is the only industry in the area. Another way the company can reduce cost is through the reduction in its raw materials cost. If the employees aren't satisfied due to the reduction in wages, they can look for employment at Utopia Industry.
Therefore, the correct option is E.