When the passive voice is changed to active voice, the object and the subject of the sentence interchange their positions, the focus is the subject performing the action. The verb of the sentence changes into its active form. However, the tense of the sentence is not changed.

Option A is correct as it correctly converts the passive to active while keeping the future perfect tense of the sentence intact.

Options B and C are incorrect as they are not in the future perfect tense. Option D is incorrect as well because it is no longer an interrogative sentence as the original sentence in the question is.