Compare their blood types. Compare their handwriting. Compare their genes. Compare their fingerprints.
I am hesitating between 4 options to answer the following question, which option should I choose?
Question: Which of the following is the best way to determine whether two people are related?
Possibilities:
- Compare their blood types.
- Compare their handwriting.
- Compare their genes.
- Compare their fingerprints.

Compare their genes.