Question

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.

Explanation:

A redundant sentence contains unnecessary repeated or obvious content. To improve it, the core fix is removing this unneeded repetition. Adding modifiers, eliminating strong words, or including obvious wording all worsen redundancy or weaken the writing.

Answer:

Remove unnecessary repetition.