Which of the following is the correct way to define the constructor(s) of the Sample class if we are to create objects as per the C#.NET code snippet given below?

• A. public Sample() { i = 0 ; j = 0.0 f; } public Sample ( int ii, Single jj) { i = ii; j = jj; }
• B. public Sample (Optional int ii = 0 , Optional Single jj = 0.0 f) { i = ii; j = jj; }
• C. public Sample ( int ii, Single jj) { i = ii; j = jj; }
• D. Sample s;