What is Cy's full legal name?

The correct answer is Cybill Marie Dagpin Tan because it accurately represents a full legal name consisting of a first name, middle name, and last name in a conventional format. Full legal names usually include the first name (Cybill), a middle name (Marie), and the last name (Dagpin Tan). This structure is commonly used in official documents, and identifying a full legal name is crucial in the context of marriage interviews for naturalization, as it helps confirm identity and associated documentation.

The other options do not comply with the standard format or do not represent a full legal name correctly. For instance, Peter Wong and Maria Wong reference individuals with potentially shorter names or different individuals, while Tan Cybill Dagpin rearranges the name components which might not reflect how the individual is officially recognized.