It was mostly the "Environment and LGBT rights" movement that grew to be a significant social movement of the 1990s, since these issues were largely ignored during the movements in the 50s and 60s.
The correct answer for the given question above would be option A. The option that grew to be significant social movements of the 1990s is the environment and LGBT rights since these issues were never given any attention or importance during the 50s and the 60s movement.
