Each Alternative Below Gives a Distance on the Baseline of the Normal

Each alternative below gives a distance on the baseline of the normal curve in standard deviation units. Choose the limits that mark off the smallest proportion of the normal curve.

A) -3 $\sigma$ to -2 $\sigma$
B) -l $\sigma$ to 0
C) -l $\sigma$ to l $\sigma$
D) l $\sigma$ to 2 $\sigma$ .