Which type of scope can be assigned to a label in programming?

In programming, specifically within languages like C, C++, and Java, labels are primarily associated with control flow statements, such as loops or switch cases. The correct type of scope that can be assigned to a label is function scope. This means that a label defined within a function can only be referenced and used within that same function, capturing the behavior of labels within the confines of the function's execution context.

Function scope indicates that the visibility and lifetime of the label are bound to the function it resides in. Once the function exits, the label is no longer accessible. In contrast to this, block scope applies to variables defined with certain block statements, such as loops and conditionals, which is not the case for labels. Global scope allows an identifier to be accessed throughout the entire program, while function-prototype scope, specific to function declarations and not labels, governs how names are visible within prototype declarations.

Therefore, the identification of function scope as the correct answer aligns with the way labels operate in a programming context, as they are restricted to the block of code within the function in which they are defined. This ensures that labels serve as localized markers for control flow within their respective functions.