Which was the main reason for the slow growth of labor unions in the United States during the 19th century?

(1 point)
Responses

presence of language and cultural barriers among workers
presence of language and cultural barriers among workers
existence of adequate wages and good working conditions
existence of adequate wages and good working conditions
lack of public and legal support for union activities
lack of public and legal support for union activities
rejection of unionization by skilled workers

rejection of unionization by skilled workers