<span>A. Mr. White will make other serious mistakes by acting without thinking of the consequences.</span>
The correct answer would be A because you need a comma in between the <em>A </em>and <em>S</em>
This type of source would be
"books of more than one volume"
It appears to be a 4-volume series regarding Southern Rock Opera. We cannot infer that its an anthology, which is a number of collected works within the same genre (such as a 70's rock greatest hits collection), and there are more than one author listed. We also do not know which edition it is.