Given the code fragment: int [][] array2d = new int[2][3]; System.out.println("Loading the data."); for ( int x = 0; x < array2d.length; x++) { for ( int y = 0; y < array2d[0].length; y++) { System.ou

This syntax uses parentheses `()`, which is incorrect for array access and is instead used for method calls.

This syntax uses a space ` ` between indices within a single set of brackets, which is not valid Java array indexing syntax.

This syntax uses a comma `,` between indices within a single set of brackets, which is incorrect for accessing a 2D array element in Java.

In Java, to access an element at a specific row `x` and column `y` in a two-dimensional array `array2d`, the correct syntax uses two sets of square brackets, `array2d[x][y]`. The statement `array2d[x][y] = x + y;` correctly assigns the sum of `x` and `y` to the array element.

This syntax uses nested square brackets `[[x][y]]`, which incorrectly implies accessing an array of arrays of arrays, not a simple 2D array element.