Which of the following is a valid reuse of the variable data?

To determine the validity of reusing the variable data, it’s essential to consider the context in which the variable is defined and the type of data it can hold. In programming, variable types dictate the kinds of values that can be assigned to them.

When a variable is first declared, it is typically assigned a specific data type based on the value assigned. If the variable data can hold integers, then assigning an integer value, such as 43, is indeed a valid reuse. This assignment maintains consistency in the data type and allows the program to function correctly, assuming that later usages of the variable are compatible with this type.

In contrast, assigning a string like "Hello," a boolean value like true, or a null value to the same variable would typically lead to type mismatches or errors, depending on the programming language's rules regarding variable types. Each of those data types would require the variable to either be explicitly declared as another type or switched dynamically if the language allows for mixed types.

Thus, reusing the variable data with an integer value is appropriate within contexts where the variable is expected to handle numeric types, which supports the logic and operation of the code.