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The most common reasons for an employee’s unwill­ingness to accept a transfer are that mortgage rates are high, housing in the new location costs more, and the difficulty of selling the old home.

(A) that mortgage rates are high, housing in the new location costs more, and the difficulty of selling the old home.

(B) that mortgage rates are high, housing in the new location costs more, and that it is difficult to sell the old home

(C) high mortgage rates, the greater cost of housing in the new location, and that the old home is difficult to sell

(D) high mortgage rates, the greater cost of housing in the new location, and it is difficult to sell the old home.

(E) high mortgage rates, the greater cost of housing in the new location, and the difficulty of selling the old home

正确答案是E，而B 为什么不可以呢？都是句子并列

and 前后谁和谁并列？如果是两个that从句并列的话，那housing前面应该有个and

谢谢！