Which process is recommended for calculating the elapsed running time of an algorithm?

Group of answer choices

Calculate the difference obtained by calls to the method System.currentTimeMillis$()$ at the start of the program and at the end of the program so that the elapsed time includes the display of the result.

Use a physical stopwatch to record the length of time it takes to run the program.

Calculate the difference obtained by calls to the method System.currentTimeMillis$()$ just before the start of the algorithm and just after the end of the algorithm.

Use the value returned by the method System.currentTimeMillis$()$ just after the end of the algorithm as the elapsed time.