I soon found that the work I was doing had already been done by someone else. , I was wast

I soon found that the work I was doing had already been done by someone else. , I was wasting my time.
A. In other words
B. In a word
C. As a result
D. In addition

(答案→)A. In other wordsB. In a wordC. As a resultD. In addition解析：考察词组，in other words 换句话说 in a word总之 as a result结果 in addition除此之外 句意为，我很快发现我在做的工作已经被某个人做过了。换句话说，我在浪费时间

对的，就是这个意思