Final answer:
The correct option for declaring and initializing a String in Java is D: String alpha = "Hello Quiz!"; which follows Java's standard syntax for creating and assigning a string literal to a variable.
Step-by-step explanation:
The correct way to declare and initialize a String in Java is option D: String alpha = "Hello Quiz!";. Options A, B, and C are not the correct syntax for creating a String in Java. Option A uses parentheses in a way that is not syntactically correct for defining a String. Option B lacks the variable name and uses an '=' sign instead of the correct Java assignment syntax. Option C incorrectly attempts to mix syntax from object creation with a string literal and is not a valid Java statement.