Programming Pre-test Post test do until loop

Which of the following is a pre-test, counter-controlled Do Until loop?

A.	Do   Console.WriteLine("Enter an Exam Score: ")   sum = sum + Convert.ToDouble(Console.ReadLine())   counter += 1 Loop Until (counter > numberOfExams)
B.	Loop   Console.WriteLine("Enter an Exam Score: ")   sum = sum + Convert.ToDouble(Console.ReadLine())   counter += 1 Do Until (counter > numberOfExams)
C.	Do Until (counter > numberOfExams)    Console.WriteLine("Enter an Exam Score: ")    sum = sum + Convert.ToDouble(Console.ReadLine())    counter += 1 Loop
D.	Do Until (counter > numberOfExams)    Console.WriteLine("Enter an Exam Score: ")    sum = sum + Convert.ToDouble(Console.ReadLine())    counter += 1 End Do