Question

a negative effect of the 1933 national industry recovery act was
employees bargaining with employers.
employees spying on employers.
employers bargaining with the government.
employers spying on employees.

Explanation:

The 1933 National Industry Recovery Act (NIRA) had provisions, but a negative effect was employers using methods like spying on employees to undermine unionization or worker rights. Bargaining (employees with employers or employers with government) was not a negative effect in the context of the Act's issues, and employees spying on employers is not a known negative effect. The correct option relates to employers spying on employees as a negative outcome of the Act's implementation and employer reactions.

Answer:

employers spying on employees.