For the Given Data Value, Find the Standard Score and the Percentile

Multiple Choice

For the given data value, find the standard score and the percentile.
-A data value 0.9 standard deviations below the mean.

A) $z = - 0.9 ;$ percentile $= 81.59$
B) $z = - 0.9$ ; percentile $= 18.41$
C) $\mathrm { z } = - 0.09$ ; percentile $= 46.02$
D) $\mathrm { z } = 0.9$ ; percentile $= 81.59$