Organizations in the United States such as the National Association for the Advancement of Colored People and the National Council of La Raza, a Hispanic advocacy group, have opposed adding a "multiracial" census category. This suggests that

racial classification is a political issue in that these groups fear their political clout will decline if their numbers go down.

Explanation:

Multiracial census category will eventually brings or takes a lot of people from each of the normal categories together. For example people of mixed race, like African Americans, whose one of the parents is white or Spanish, or Hispanic Americans whose either of the parents is white as well. Many, if not all of these people will be classified as multiracial, hence, the number of members of Organizations in the United States such as the National Association for the Advancement of Colored People and the National Council of La Raza, a Hispanic advocacy group will reduce greatly.

Therefore, when these groups opposed multiracial census category, it suggests that, racial classification is a political issue in that these groups fear their political clout will decline if their numbers go down.

what are the options?