Final answer:
A function template can be prototyped, which means that its signature is declared before its implementation. This allows compilation without errors despite the actual implementation being provided later.
Step-by-step explanation:
A function template in programming can indeed be prototyped. A prototype is a declaration of the function before its implementation and is particularly beneficial in the case of templates. This allows the code to be compiled without errors even if the function implementation is provided later in the code. Prototyping function templates works similarly to prototyping regular functions, providing a way for the compiler to know about the function signature ahead of its actual definition. Options B and C, centralized and tokenized, do not pertain to the concept of function templates in typical programming language terminologies. Therefore, the correct answer to the question is "A. prototyped".