You have recently retired and made your new home near the campus of a prestigious college. One afternoon as you walk through the lovely campus, you notice that a public lecture will take place on the subject of great interest to you....Business Analytics: New Science or Passing Fad. The lecturer is renown Professor of Data Science, Yu Chi Liu. You decide to attend and sit near the front of a packed lecture hall (your hearing loss makes it necessary). Prof. Liu states that business analytics begins with the following: "collection, organization, and manipulation of data." You sheepishly raise your hand and Prof. Liu calls on you. You ask: "What is data manipulation Prof. Liu?" She smiles and says: "You tell me." She offers you the choices below. Which is the best choice?

A: The act of recording data, either by collecting responses to questions or some other form of data entry

B:	The systematic transcription of data into a data management system or platform that will permit analysis (e.g., an Excel workbook or Microsoft SQL Server)

C:	The act of examining a data set for missing data elements or elements that are impossible or improbable (e.g., a value that is a text value when it should be a numerical value)

D:	The act of changing data into a form that is more convenient or compatible for analysis; for example, taking a numeric value (say $104,091.43) and replacing it with a categorical designation (say between $90,000 and $125,000)