Answer:
C. The variable is quantitative because amount of disk space is found by measuring or counting.
Step-by-step explanation:
Quantitative Variables are variables whose values are obtained from counting or measuring something. Examples are height, weight and time.
Qualitative Variables on the other hand are variables that describes an attribute or characteristics. Examples are religion, profession and hair color.
The Amount of disk space in gigabytes is a measurable variable, therefore it is a Quantitative Variable.
The correct option is C.