Final answer:
Option D effectively combines the meanings of the lines by considering the typical elements of a diary and explaining why the work is regarded as a history rather than a diary.
Step-by-step explanation:
The sentence that most effectively combines the meanings of these lines is option D. Considering the typical elements of a diary, explain why you think this work is regarded as a history rather than a diary.
This sentence combines the idea of considering the elements of a diary with explaining why the work is seen as a history rather than a diary. It also maintains a clear and concise structure.