In this passage from the declaration of independence, jefferson was employing which persuasive technique? a. appeal to ethics b. appeal to emotion c. appeal to logic d. appeal to authority

As the passage is not added, it would refer to the text in general. 
It could be said that in his Declaration of Independence, Jefferson appealed to logic (option C) His detailed explanation of what was wrong about the government against colonies was based on a rational justification for the revolution. He expected the reader to follow his way of thinking, his reasoning.