Grovey v. Townsend stood for all of the following, except

A.
The Texas Democratic Party could deny African-Americans membership and consequently the right to vote in its primary election.

B.
The NAACP while having lost this case, proved to be a capable and effective advocacy group.

C.
Was the victory that made Brown v. Board of Education possible a few years later.

D.
Showed that legal advocacy in the courts was a viable strategy to gain civil rights.