Final answer:
The OLE data type is used for storing complex data like employee resumes and photos, not for secure information, user-defined data types, or mathematical functions.
Step-by-step explanation:
The type of data that might be stored in a field with an OLE (Object Linking and Embedding) data type is C. Employee data such as resumes and photos. OLE data types are used in database systems and allow fields to store files created by different applications as objects. These can include word processing documents, spreadsheets, images, sound, and more. You can embed data from one application into another, such as embedding a chart from Excel into a Word document. This allows for interactive data that can be edited with the appropriate application directly from the database. However, OLE types are not meant for storing secure and encrypted data such as passwords and credit card numbers, nor are they used to define user-created data types or store mathematical calculations and functions.