Final answer:
The geologist and the historian learn the same languages.
Step-by-step explanation:
The statement suggests that any language learned by a geologist is also learned by a historian. This means that the geologist and the historian learn the same languages (option D) because they both acquire the same languages in their respective fields of study. For example, both geologists and historians may learn languages like English, French, German, or Spanish, depending on their area of specialization and the regions they study.