Jack registered as a conscientious objector during the Vietnam War. He believes that it is wrong to take human life. He is willing to serve time in jail, rather than take part in an armed conflict. Jack's reasons for not going to war reflect the stage of moral reasoning established by Kohlberg.

Post-conventional moral reasoning

Explanation:

Post-conventional moral reasoning was proposed by Lawrence kohlberg, he explains is as the ethical reasoning of moral actors who carry our decision based on rights, duties, values or even principles that are general. In most cases this principles are open to criticism as individuals hold various opinion to issues and possess different sense of judgement, this makes the separable from authorities. Although Jack's choice may be opinion of some people they still create room for critisim as every does not see war as just taking human life especially when fighting as a soldier for the cause of your country.

the answer your looking for is c. : )