The National Council of Teachers of English, the National Council

The National Council of Teachers of English, the National Council of Teachers of Mathematics and the National Science Teachers Association are all examples of what?

A) Regulatory agencies that directly assess the effectiveness of specific teachers in their content areas
B) National specialized associations responsible for, among other things, setting content standards and researching content instructional methods
C) National labor unions whose purposes include ensuring adequate teacher support and providing due process to teachers wishing to alter their content area standards
D) Lobbyist groups that effect change in education at the federal and state levels