Which of the Following Statements Are True Regarding the Areas $\mu - \sigma \text { to } \mu + \sigma .$

Multiple Choice

Which of the following statements are true regarding the areas beneath any normal curve?

A) About 68.3% of the area is in the interval $\mu - \sigma \text { to } \mu + \sigma .$
B) About 95.5% of the area is in the interval $\mu - 2 ? \text { to } \mu + 2 \sigma$
C) Nearly all of the area (about 99.7%) is in the interval $\mu - 3 \sigma \text { to } \mu + 3 \sigma$
D) All of these are true.
E) None of these is true.