Final answer:
The presence of fortifications is a major difference between Minoan palaces and Mycenaean citadels, with the latter having strong defensive elements due to their war-like culture. Hence, the correct answer is option .
Step-by-step explanation:
A major difference between Minoan "Palaces" and Mycenaean citadels is the presence of fortifications. Minoan architectural complexes, such as those on Crete, lacked fortifications, indicating they were less concerned about foreign invasions, likely due to their geographical setting on an island with a natural protective landscape, and were more focused on trade and commerce.
In contrast, Mycenaean architecture reflects their warring society with structures featuring strong defensive elements including cyclopean masonry and strategically designed gates like the famous Lion Gate. The Mycenaeans built their citadels on high, rocky outcrops to oversee and protect their surroundings, clearly indicating their concern for security and military power.