In means that things or items are separate from all other items. <span />
Persuasive Devices - Think debates. People will use the art of persuasion to make their ideas appealing to the audience. It applies the same way here. The author will use persuasive devices to make their ideas known to the reader and make them appealing.
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.