To answer this question, let's go through the line of code:
Double table[];
This line of code declares a variable named table of type Double and specifies that it refers to an array of Double objects.
Option A) table is a variable that refers to a real number - This option is incorrect because Double in Java refers to a wrapper class for the primitive data type double, not a real number.
Option B) table is a variable that refers to two numbers - This option is incorrect because the code does not indicate that table refers to two numbers specifically. It simply declares a variable that can refer to an array.
Option C) It is not legal Java code - This option is incorrect because the code is valid Java syntax. It declares a variable of type Double array.
Option D) table is a variable that refers to an array - This option is correct because the line of code declares a variable named table that refers to an array. The [] syntax indicates that table is an array variable.
The correct answer is D) table is a variable that refers to an array.