Deontology
The idea that we have duties to uphold to, whether these duties are to follow the laws set by a greater being (divine command ethics) or that we have duties to do what is right for no other reason than because they are the right thing to do.
Utilitarianism
Maximising the amount of happiness in the world and minimizing to amount of suffering
Virtue theory
Trying to lead a virtuous life by doing things that are in line with the cardinal virtues: courage, wisdom and temperance and in doing so fulfilling the fourth virtue of justice. Some may also involve the metaphysical virtues: faith, hope and charity.
I would prefer not to add the fourth option of "all of the above" because I am sure that most people would just chose that option as an easy way out so please don't ask for one.
If the above descriptions aren't precise enough, just ask and I will try to expand on them.
By the way, your vote is not final, you are allowed to change your mind.