求助大全-d-19

19.   Just
because King Alfred occupied and fortified London in 886 did not mean that 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. 

(A) Just because
King Alfred occupied and fortified London
in 886 did not mean that he

(B) The fact that
King Alfred had occupied and fortified London
in 886 did not mean that he had

(C) Just because
King Alfred occupied and fortified London
in 886, it did not mean he

(D) The fact that
King Alfred occupied and fortified London
in 886, it did not mean that he（B）

(E) Just because
King Alfred had occupied and fortified London
in 886, it did not mean he

答案是B, 我选的是A. 不明白A错在哪里。

A: because King Alfred occupied and fortified London in 886 是原因状语从句，不能做主语

it指代London ，he已经指代king alfred了嘛