Final answer:
The main form of teleological ethics is called Consequentialism, where the morality of actions is judged by their outcomes.
Step-by-step explanation:
The main form of teleological ethics is called C) Consequentialism. In teleological or consequentialist ethics, the morality of an action is primarily determined by its outcomes or consequences. Consequentialists believe that an action is morally right if it produces the greatest amount of good for the greatest number of people, a principle commonly associated with utilitarianism. This stands in contrast to deontological ethics, which focuses on duties and rules, arguing that an action is right if it complies with moral duties, irrespective of the consequences.