Victor assaults his investigations with excitement and, overlooking his public activity and his family far away in Geneva, gains quick ground. Later, Ardently dedicating himself to this work, he ignores everything else; family, companions, studies, and public activity, and becomes progressively pale, desolate, and fixated.
"The Tempest" is considered a revenge tragedy. The usurpation of Prospero's dukedom from Antonio, his own beloved brother, is an indication of his distemper. Words that can create a tone of reproach and melancholy for the past are: "evil nature", falsehood", "perfidious" which are attributed to the dishonest brother. Miranda appears to live in a dream place where corruption and malevolence do not exist. However, Prospero's negative attitue towards Antonio expresses that there is evil in human nature and it can even come from close acquaintances and family.
The answer is the third choice or choice C. Persuade means to CONVINCE someone to try to do something or try something. In this case the speech is PERSUADING the audience to become vegetarians.