displayName;
displayName(void);
void displayName;
void displayName(); E. void displayName(none);
Answer is Wrong!
Answer is Right!
The correct answer is: D. void displayName();
A function prototype is a declaration of a function that tells the compiler the
name of the function, the type of data it returns, and the types of data it expects as input. In this case, the function displayName does not return any data and does not take any input data, so its prototype is simplyvoid displayName();.
The other options are incorrect because they either do not specify the return type of the function (A), or they specify the wrong return type (B, C, E).