Answer:
Option C=> conduct a genealogical study of your extended family.
Step-by-step explanation:
Personal ethics are set of standards or criteria set by individuals to determine or judge what is morally right or what is morally wrong. Ones' Personal Ethics are 'personal' and peculiar to that particular individual and this Ethics are set up in order to make decisions.
The options 'A', 'B' and 'D' are correct because they are actually things that concerns one personally and not others(whether related biologically or not). It is solely about the individual.
If you take a look at option 'C' of the question above it talks about inclusion of family members.