Sonia and Sam Are Colleagues Who Are Working Together to Produce

Multiple Choice

Sonia and Sam are colleagues who are working together to produce a fundraising letter for a non-profit organization. They have each made changes to the first draft of the letter, and they need to produce one final version that incorporates both sets of changes.
-Sonia and Sam are ready to begin the process of highlighting the differences between the two versions. They have designated Sonia's document as the original document and Sam's document as the revised document. Which of the two documents (if any) must be open before they begin the comparison?

A) Only the original document must be open.
B) Only the revised document must be open.
C) Both the original document and the revised document must be open.
D) Neither the original document nor the revised document must be open.