b) no 25. __ shall be recognized as the agreement, concluded by two or by several persons on the institution , modification or termination of the civil rights and duties. a) the contract b) the legal document c) the legal act

The correct answer is c) the legal act.<br /><br />Explanation: A legal act is a formal agreement or document that is recognized by law and establishes the rights and obligations of the parties involved. It is used to regulate various aspects of civil life, such as the institution, modification, or termination of civil rights and duties. Contracts and legal documents may also fall under the category of legal acts, but the term "legal act" is more comprehensive and specifically refers to agreements that have legal recognition and implications.