Which sentence needs quotation marks added to be correct?
a. what are you talkin about, marcus? asked shelby
b. melinda asked me this morning if i had ever been to europe.
c. the book said to add the tomato sauce just before serving.
d. when mrs. connors told us to be careful, i should have listened.

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.

original oratory is a competitive event in the national speech and debate association, stoa usa, national catholic forensic league, and other high school forensic competitions in which competitors deliver an original speech on a subject of their choosing, though the speech must be factual.racial discrimination refers to discrimination against individuals on the basis of their race. policies of racial segregation may formalize it, but it is also often exerted without being legalized and also it means facing injustice.