Which of the following is an example of Boolean data?

Boolean data represents one of two possible states: true or false. This type of data is integral in programming and logical operations, serving as the foundation for decision-making processes within algorithms and applications. In decision trees and conditional statements, Boolean values are utilized to control the flow of execution based on certain criteria.

Other options encompass different data types that cannot be classified as Boolean. A number, such as 7, falls under numeric data types and represents a quantitative value. A character like 'A' is a single unit of textual data, while a string like "Hello" is a sequence of characters. Each of these examples serves distinct functions in data representation and manipulation, but they do not embody the binary true/false nature of Boolean data. Thus, the unique characteristic of true and false values makes them the correct representation of Boolean data.