Final answer:
Martina is using both primary and secondary sources for her investigative journalism on local government corruption, involving interviews, news videos, memos, and anonymous documents.
Step-by-step explanation:
Martina is working with a variety of materials for her story on corruption within the local government. These materials include primary data such as interview transcripts and videos from local news, as well as secondary sources like school board memos and documents from an anonymous source. When gathering information for investigative journalism, it is common practice to work with both archival materials and transcribed data. Martina is also taking a page out of the traditional and investigative journalism reports, using methods similar to renowned investigations like Watergate to unveil wrongdoing in government.