Answer:
A. What are you talking about, Marcus? Asked Shelby.
Explanation:
The correct way of writing the above sentence will be
"What are you talking about, Marcus?" asked Shelby.
As the sentence is based on a conversation, inverted commas should be used to open the sentence as well as close it. The rest of the options are indirect speeches while the first option is a direct speech. Thus, the punctuation.
A.occurs while actively observing in the field
The correct option is
<span>a. poetry written in unrhymed iambic pentameter....</span>
D because it is copied word for word. To avoid plagiarism, rephrase every sentence.