The novel Old Yeller was written by Texas author Fred Gipson in 1956. It depicts life in Texas during the early days of the cattle drives in the late 1800s. Which of the following choices best explains why this would be considered a secondary source? OA. because the author talks about his own experiences on cattle drives OB. because it is a work of fiction that is not based on fact WE - because it talks about a time period that happened many years before OD. because the author meant it to be an article in a textbook​