The Ancient Hindus Had Suspects Chew Rice as Part of a Test

The ancient Hindus had suspects chew rice as part of a test of their innocence. For the Hindus, what indicated innocence in this test?

A) The innocent person was able to chew the rice and then spit the rice out which is not dry, on a sacred tree leaf.
B) The innocent person was able to chew the rice but wouldn't be able to spit it out because of the activation of the sympathetic nervous system.
C) The innocent person was expected to refuse to do the task.
D) The innocent person was able to chew the rice but wouldn't be able to spit it out because of the activation of the parasympathetic nervous system.