A characteristic that may have more than one value or score is called a(n)

A) variable.
B) value.
C) hypothesis.
D) observation.

A characteristic that may have more than one value or score is referred to as a variable in research. Therefore, option A is the correct answer. Option B refers to a single value or score, while option C refers to a tentative explanation to be verified and option D is an outcome or result of an observation.