Answer: Visibility

The three key characteristics of Big Data are commonly referred to as the 3Vs: 1. **Volume** - The massive scale of data 2. **Velocity** - The speed at which data is generated and processed 3. **Variety** - The different types and formats of data **Visibility** is not one of the three key characteristics of Big Data. Some frameworks expand the concept to include additional Vs such as Veracity (data quality/trustworthiness) or Value (business value), but the core three are Volume, Velocity, and Variety. Therefore, option C (Visibility) is the correct answer as it is not generally considered one of the three key characteristics of Big Data.

Author: LeetQuiz .