A quality improvement consultant has promised that his techniques will reduce variance in a particular process. Prior to implementation, the variance in this process was $28.$ A random sample of $80$ observations drawn from this process exhibited a sample variance of $22.$ If alpha was set at $0\mathrm{.}05,$ a test of $H_1{}^{2}28$ would imply that the consultant's techniques $,$rocess variance.

A $$ reduced

B $$ increased

C $$ did not change

D multiplied