Which of the Following Was the Result at the U

Which of the following was the result at the U.S.Supreme Court level in Wal-Mart Stores,Inc.v.Dukes,the case in the text involving the issue of whether the plaintiffs could proceed with a class action against Wal-Mart alleging sex discrimination?

A) That the plaintiffs would be allowed additional time to establish beyond a reasonable doubt that at least 50% of the plaintiffs involved had suffered sex discrimination at which point a class would be certified.
B) That the issue of whether a class action was appropriate was an issue for the jury's determination.
C) That a class action was appropriate because the plaintiffs had established that the company operated under a general policy of discrimination.
D) That a class action was inappropriate because the plaintiffs had failed to show that the company operated under a general policy of discrimination.