题目选项分析

Just because King Alfred occupied and fortified London in 886, it did not mean he also won the loyalty of its citizens: the invading Danes were well aware of this weakness and used it to their advantage in 893.

The fact that King Alfred had occupied and fortified London in 886 did not mean that he had also won the loyalty of its citizens: the invading Danes were well aware of this weakness and used it to their advantage in 893.