prep-1-105 急，下周就考了

105. (30121-!-item-!-188;#058&004107)
Even though it was not illegal for the bank to share its customers' personal and financial
information with an outside marketing company in return for a commission on sales, the state's
attorney general accused the bank of engaging in deceptive business practices by failing to honor
its promise to its customers to keep records private.
(A) by failing to honor its promise to its customers to keep
(B) by its failure of honoring its promise to its customers to keep
(C) in its failing to honor its promise to its customers of keeping
(D) because of its failure in honoring its promise to its customers in keeping
(E) because of its failure to honor its promise to its customers of keeping

答案A，但是by failing to 不会引起the state's attorney 和bank 两个主语修饰歧义么？

没人回答，顶一下。

我想问下，这里的B）选项用fail的名词形式为什么不如fail的动名词failing呢？我已将被动词的动名词形式，名词形式，现在分词形式彻底搞晕。

B是用名词套名词的形式（its failure of honoring ）来表明动作，这样的表达是不可取的，显然不如failing to honor好