The sentence The findings of the study will be published in Scientific Journal next month is in the passive voice because the subject of the sentence (the findings of the study) doesn't act but it is rather the passive recipient of the action. If we wanted to rewrite the sentence in the active voice, that would be:
They will publish the findings of the study in Scientific Journal next month.
So, the correct answer is: This sentence can be rewritten in the active voice.
