In a large set of data that are approximately normally distributed,
r is the value in the data set that has a z-score of -1.00
s is the value of the first quartile, and
t is the value of the 20th percentile.
Which of the following is the correct order from least to greatest for the values of r, s, and t?
A: r, s, t
B: r, t, s
C: s, t, r
D: t, r, s
E: t, s, r