The answer is A. ostinato
Andrea del Verrocchio, Boudin, Leonardo da Vinci, Perugino, Ghirlandaio and Sandro Botticelliare some of the people that influenced Michelangelo's early works of art.
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I only know two and they are
1. Not discussing issues and not supporting them with information.
2. Not giving advice on what to say/talk about.