Transform "Everyone thinks he is innocent" using "to believe".

The choice that transforms the original sentence effectively maintains the meaning while incorporating the word "believe."

The original statement conveys a general consensus among people about someone's innocence. By saying "Everyone believes he is innocent," the transformation captures the essence of the original sentence—indicating that a collective opinion exists regarding the person's innocence, utilizing "believes" to express this viewpoint.

The other choices do not accurately reflect the original meaning or imply a change in perspective that alters the intent. For instance, statements that introduce negation or alter the subject do not align with the original context. Therefore, the selected transformation successfully conveys the same sentiment using the new structure required.