What are four complicating factors for determining whether a passage contains an argument?
a) The presence of opinions, the tone of the passage, the length of the passage, and the complexity of the language.
b) The use of rhetorical questions, the presence of statistics, the clarity of the author's position, and the relevance of the information.
c) The presence of implicit premises, the lack of explicit indicators, the ambiguity of language, and the mixing of facts and opinions.
d) The author's credibility, the number of supporting examples, the logical structure of the passage, and the frequency of emotional appeals.