Final answer:
The correct answer from the provided options is d. static, void, main.This signature must be present for the JVM to initiate the program's execution.
Step-by-step explanation:
The segment of code in question is the main method signature that is present in all Java programs. The correct keywords in the correct order to fill in the blanks are: public static void main(String[] args) { }.
This line defines the main method of a Java application, which is the entry point of any Java program. The public keyword means that the method can be called from anywhere, static means that the method can be called without creating an instance of the class, void indicates that the method does not return any value, and main is the name given to the method which is recognized by the JVM as the starting point of the program.