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Which of the following is insoluble in water?
Witness Signature
A signature by an uninvolved party on a document, acknowledging they observed the signing process and verifying its authenticity.
Notary Public
A public officer authorized to witness the signing of important documents, administer oaths, and perform other administrative functions.
High School Teacher
An educator who instructs students in grades 9 through 12 in a variety of academic subjects.
University Professor
An academic title for a higher-level educator and researcher at a college or university, typically involved in teaching and scholarship.
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