The step that would calm down Charlie, or any writer, is the writing itself. As you might now, the writing process has several steps, the first one is brainstorming, then planning, after that writing, and lastly revising and editing. After the writing part is done, the ones that folow are done pretty fast, though they are crucial to the writing process.
B is the correct answer because A makes the reader believe that the two Notaries preferred ether of the options rather than specifying they each chose only one type.