The best option for applying Kohlberg's theory to Tarzan in chapter 7, when he saves Kala from Tublat, would be:
D) Tarzan is in stage 5 or 6, beyond law and order (protection of life overrides law and order).
In this context, Tarzan's actions reflect a moral reasoning that prioritizes the safety and well-being of Kala over any established rules or norms, indicating a higher level of ethical development consistent with stages 5 or 6.