Answer:
C. Formal
Explanation:
Writings with formal tones often contain descriptive, precise and elegant words and it is totally free of idioms, colloquialism, slang, and contractions. Formal texts also tend to lack active voice sentences, casual words, and it is impersonal.
The passage has all those characteristics as it lacks idioms, colloquialism, slang, and contractions; it is impersonal (there is no use of first-person pronouns such as ‘I’ or ‘We’), it uses more the passive voice rather than the active one (Some examples are "and it may be disclosed to authorized officials" and "Your Social Security Number (SSN) is needed to keep our record accurate"), and the vocabulary used is not casual.
