文法：英文冠詞的問題

在討論區問了個關於英文冠詞的問題:

Apart from disposing of rubbish carefully and changing the water that hold plants every week, name two other methods to prevent the accumulation of stagnant water.

Can I omit the "the" before "accumulation"? I always think the use of articles is one of the most difficult thing in English learning.

答案竟然是:....