Select the correct conclusion based on the meaning of the bold idiom: The boy exulted in the success of his petty thefts but the Arguseyed mother knew it all.
i. The boy was clever enough to take a little money at a time so that his mother never noticed it.
ii. The mother looked at her boy with such love and compassion that he regretted his actions.
iii. The mother was extremely vigilant and caught the boy red handed one day.
iv. The doting mother failed to see the faults of her boy and he became bolder in his acts.