NN们帮我解释下大全一题

5.     With its abundance of noun inflections, Icelandic is one of several Germanic languages that is compact when written but can lengthen considerably when translated into English.

(A) is compact when written but can lengthen considerably when translated into English

(B) are compact when they are written, but they can lengthen considerably when they are translated in English

(C) is compact when written but can lengthen considerably when being translated into English

(D) are compact when written but can lengthen considerably in English translation（D）

(E) is compact when it is written but can lengthen considerably when translated in English

请大家帮我解释下全文的意思,以及推理的过程,万分感谢

同问:

  B 除了不简洁, 有别的逻辑错误吗?

  B, D 逻辑意思有没有不一样被翻译成英语，　和英语翻译？

谢谢~~~

先判断单复，One of+复数名词+that 用复数.b太罗嗦,出现了很多they