Chebyshev's Theorem States That

Chebyshev's theorem states that:
i. About 68% of the observation will lie within one standard deviation of the mean;
ii. About 95% of the observations will lie within two standard deviations of the mean;
iii. Virtually all (99.7%) will lie within three standard deviations of the mean.

A) (i) , (ii) and (iii) are all correct statements
B) (i) and, (ii) are correct statements but not (iii) .
C) (i) and, (iii) are correct statements but not (ii) .
D) (ii) and (iii) are correct statements, but not (i) .
E) (i) , (ii) and (iii) are all false statements.