The acronym SOAP is meant to stand for the concepts of <em>Speaker, Occassion, Audience and Purpose</em>, and it represents a useful strategy to approach writing. These are the elements that have to be kept in mind before we begin writing. Speaker refers to the voice that you will use in your writing. Occassion refers to the time and place in which this story takes place. Audience refers to the people to whom your piece is directed. Finally, Purpose refers to what you want to achieve by writing.
The error in this sentence is a A) pronoun-antecedent voice agreement error. But it should be noted that this has become more standard usage in common dialogue.
