Sentence improvement (active vs passive): choose the correct passive of obligation/requirement Original sentence: "Technology must use to feed the forces of change." Select the option that makes the sentence grammatical and natural.

Given data

• Modal “must” + verb “use” appears, but the logical subject (who uses?) is not specified.

Concept/ApproachWhen the focus is on technology as the thing acted upon, we require the passive voice: “must be used …”.

Option analysismust be used to feed — correct passive infinitive after a modal. ✅must have been using, must be using — progressive aspects with an agented subject, which we do not have.must use having fed — ill-formed non-finite sequence.No correction required — original is ungrammatical.

Final Answermust be used to feed the forces of change.