The answer is 'd' ,but the complete indirect object is 'her parents' not just 'parents' The indirect object always answers the question 'who'. Carol sent who? The answer is 'her parents' which is the indirect object.
Explanation: Ethos is the mode of persuasion that uses the character or appeal of the speaker to persuade an audience. Pathos uses emotion. Logos uses logic or reasoning. Ad speak is using a specific language to describe something.