Final answer:
Correct parenthetical references for authors with the same last name, Stephen King and Tabitha King, are (S. King 45) and (T. King 45), where their initials distinguish between them.
Step-by-step explanation:
The correct parenthetical references for a writer citing two authors with the same last name, such as Stephen King and Tabitha King, would include their initials to distinguish between them in the references. Therefore, the correct excerpts from the writer's paper would be:
Adding an author's first initial ensures clarity and avoids confusion for readers when multiple authors have the same last name. According to parenthetical references MLA guidelines, when authors of different sources have the same last name, their initials should be included.