The Buddha's teachings have been reconstructed from stories, found mainly in the:

Sutta Pitaka

The correct answer is Option (3) → Sutta Pitaka

The Buddha’s teachings have been reconstructed from stories, found mainly in the Sutta Pitaka. Although some stories describe his miraculous powers, others suggest that the Buddha tried to convince people through reason and persuasion rather than through displays of supernatural power. For instance, when a grief-stricken woman whose child had died came to the Buddha, he gently convinced her about the inevitability of death rather than bring her son back to life. These stories were narrated in the language spoken by ordinary people so that these could be easily understood