Answer:
D
Explanation:
You should always verify your sources in order to make sure your work is accurate, and complete.
A)
Ethos and logos
Ethos refers to the credibility of the speaker and his
knowledge about the subject. In the example given, the speaker is Dr. William
Leu who has attained a reputation and can be considered an expert about the
organ, heart, as he has over 25 years of experience being a cardiologist.
Logos refers to the message’s logic and backed up with
evidences. In the example given, Dr. Leu has researched and has a conclusion
about the topic, that’s why his claim can be considered as sufficiently backed
up.
The correct answer is after.
Prepositions usually point to a location (in, on, under), but can sometimes refer to time as well, as in the sentence above. The word after can be used either as a preposition (which is the case here), or as an adverb. The difference is that prepositions are used with nouns, whereas adverbs are used with verbs or clauses.