Recent Research That Has Reanalyzed Data on School Performance Has

Recent research that has reanalyzed data on school performance has concluded that

A) the "boy problem" is much more severe than we had previously recognized.
B) the "boy problem" was an artifact of how the data were originally analyzed.
C) middle-class boys were actually performing better than they had in the past, but minority boys were doing worse.
D) the difference between how boys were performing and how girls were performing has almost completely disappeared.