Which Code Snippet Calculates the Sum of All the Elements

Multiple Choice

Which code snippet calculates the sum of all the elements in even positions in an array?

A) int sum = 0;
For (int i = 1; i < values.length; i+=2)
{
Sum++;
}
B) int sum = 0;
For (int i = 0; i < values.length; i++)
{
Sum++;
}
C) int sum = 0;
For (int i = 0; i < values.length; i++)
{
Sum += values[i];
}
D) int sum = 0;
For (int i = 0; i < values.length; i = i + 2)
{
Sum += values[i];
}