Final answer:
The correct classification of 1/18 is C) Rational number, terminating decimal.
Step-by-step explanation:
The correct classification of 1/18 is C) Rational number, terminating decimal. A rational number is any number that can be expressed as a fraction, and 1/18 fits this definition. It is a terminating decimal because it has a finite number of digits after the decimal point. In this case, it is 0.055.