Directions: In the following sentence, one part of the sentence has an error, and the other parts are correct. Find out which part has an error and mark it as your answer. If there is no error, mark ‘No error’ as your answer. Ignore the error of punctuation, if any.

It feels great to know that even today when /(A) countries like Israel are building a /(B) ballistic missiles defence system known as an iron dome /(C) and strengthening their militaries. Some nations prefer peace than war./(D) No error. /(E)