As per the GDPR, which legal basis would be the most appropriate for an online shop that wishes to process personal data for the purpose of fraud prevention?

As per the GDPR, which legal basis would be the most appropriate for an online shop that wishes to process personal data for the purpose of fraud prevention?
A . Protection of the interests of the data subjects.
B . Performance of a contact
C . Legitimate interest
D . Consent

Answer: C