Which of the following is an operational definition?

A. A friend is someone who likes to be with you, who stands by you in time of trouble, and who listens to you when you need an ear.
B. Love is a mystery, a feeling of euphoria inspired by the thought of being together.
C. A book is a companion that provides you with a pleasing diversion during your quiet times.
D. Chemistry is the study of everything, since everything consists of chemical elements.

Answer: A

Communication & Mass Media

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