Which Rule of Classification Is Violated by the Following System

Multiple Choice

Which rule of classification is violated by the following system for classifying human heights? LESS THAN 5 FEET / FROM 5 to 6 FEET / GREATER THAN 6 FEET

A) The species are not jointly exhaustive.
B) The species are not mutually exclusive.
C) There is/are no consistent principle(s) .
D) The essential attributes are not considered.
E) No rule is violated.