Sentence Completion Test - 1
1. ____, two strong-willed Sultans, Selim III and Mahmud II, set about acquiring the scientif knowledge needed to re-build military superiority.

The sentence discusses how Sultans Selim III and Mahmud II sought scientific knowledge to rebuild military superiority. The most logical context for this would be military defeats, which would motivate them to seek improvements. Therefore, option D best fits the sentence.