Maria has a reputation as a gossip who tells any personal information she has heard. Her behavior violates the ethics of which part of the Cooperative Principle

self-responsibility      

Explanation:

The cooperative principles and values are based on the self help, equality, self responsibility, democracy, solidarity and equity. This should also includes social responsibility, openness, honesty and other ethical values such as caring for others and maintaining the privacy of others.

In the context, when Maria discloses or gossips about some personal information of others , she violates the ethics of self responsibility as well as social responsibility of the cooperative principle.

responsibilities im assuming