Which of the following is considered a secondary source?
Aa news magazine article about migrant farm workers in California
Ba collection of interviews with migrant farm workers
Ca U.S. Department of Agriculture report on farm labor statistics
Da letter written by a migrant farm worker to his family
Aa news magazine article about migrant farm workers in California
Ba collection of interviews with migrant farm workers
Ca U.S. Department of Agriculture report on farm labor statistics
Da letter written by a migrant farm worker to his family