The correct option is C all values of data are equal
Let m be the least value of the discrete data and M be the maximum value of the discrete data.
Then range = M – m = 0 (hypothesis)
∴ M = m
∴ m ⩽ each data item ⩽ M = m
⇒ each data item = m or M i.e, all values of the data are equal.