Question: What is the purpose of the synchronized keyword in Java when used with methods?

A) It ensures that the method can only be executed by one thread at a time, preventing concurrent access issues.
B) It converts the method into a static method, which can be accessed without creating an instance of the class.
C) It makes the method accessible only within the class it is defined in, preventing access from outside classes.
D) It automatically creates a new thread to execute the method concurrently with other threads.