I If a Frequency Distribution Is Open-Ended, the Variance Cannot

i. If a frequency distribution is open-ended, the variance cannot be determined.
ii. The range cannot be computed for data grouped in a frequency distribution having an open end.
iii. The standard deviation is the positive square root of the variance

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