Final answer:
The strength or likely continued success of any labor organization can be assessed by focusing on four criteria except a decline in legal conditions.
Step-by-step explanation:
The strength or likely continued success of any labor organization can be assessed by focusing on four criteria except a decline in legal conditions. The decline in union membership in the United States can be attributed to various factors including the patterns of job growth in different sectors of the economy, obstacles faced by workers in organizing, and the legal environment that makes it relatively more difficult for unions to organize workers and expand their membership. Business owners' mistrust, widespread anti-union sentiment, and the belief in a strong work ethic have also hindered effective unionization. In comparison to other countries, U.S. laws may be less friendly to the formation of unions.