The national industrial recovery act of 1933 was declared unconstitutional because: a) it granted presidents too much authority and control over codes of fair competition. b) it granted unionization rights to workers that were contrary to civil liberties. c) it encouraged workers to engage in aggressive unionization tactics. d) it did not grant employers the same rights as workers.

a) It granted president too much authority and control over codes of fair competition

Explanation:

The labour legislation National Industrial Recovery Act of 1933, enacted as an attempt to advance the US economic and help the nation recover for the Great Depression, was declared unconstitutional in the Schechter Poultry Corporation v. United States case  (1935) because it gave the President, as well as industry groups, too much authority to create and control codes of conduct and fair competition among industries without placing restrictions or rules to exercise such authority, which allowed him to make whatever laws he deemed necessary.