Correct Answer: Everyone shall blame us.

Solution : The correct choice is the third option.

Explanation: The active voice is a sentence or clause in which the subject performs the action of the verb. The typical structure of an active sentence is subject-verb-object.
Active voice involves the subject performing the action (subject-verb-object).
In the original passive sentence, "we" is the one being blamed, so in the active form, "everyone" becomes the subject performing the action. The verb "shall be blamed" is changed to "shall blame" in the active construction.

Therefore, the correct answer is: Everyone shall blame us.