The Code Segment Below Is Designed to Add the Elements

The code segment below is designed to add the elements in an array of integers. Select the expression needed to complete the code segment so that it calculates the running time elapsed. long start = System.currentTimeMillis() ;
Int sum = 0;
For (int k = 0; k < values.length; k++)
{
Sum = sum + values[k];
}
Long runningTime = ____________________________;

A) System.currentTimeMillis()
B) System.currentTimeMillis() - start
C) System.currentTimeMillis() + start
D) runningTime + start - System.currentTimeMillis()