According to the elements of style, which answer choice is consistent with strunk's rules?
use of passive voice should be discarded.
revise writing to omit needless words.
use of the oxford comma is not preferred.
write short sentences that contain few details.

Revise writing to omit needless words.

Explanation:

In The Elements of Style, one of the recommendations is to try to avoid the use of needless words. Noticing which words are useful and which ones are needless is difficult when you initially start to write. Therefore, the best way to identify them is by revising the writing once you are done. Using a lot of unnecessary words can make your message too long, and therefore, too difficult for other people to follow. It can also make a message more confusing.