Which strategy is the best way to improve the written expression in a redundant sentence? add additional modifiers and phrases. eliminate powerful words. include words that state the obvious. remove unnecessary repetition.

The best way to improve the written expression in a redundant sentence is to simply remove unnecessary repetition. A redundant sentence is a sentence that repeats ideas unnecessarily. If you remove repetitive words or ideas, the thought or idea of the sentence will not be affected. In fact, it may even be a lot clearer to the reader. 

Option D ''remove unnecessary repetition.''