15. Analyse the voice of the underlined verbal forms in the extract below and choose the suitable answer. Because of the scale of the attack, it wa...

15. Analyse the voice of the underlined verbal forms in the extract below and choose the suitable answer. Because of the scale of the attack, it was likely carried out with the help of someone with detailed knowledge of the Sony systems, they said — a theory that has been advanced before. Investigators are probing whether (…).
A) Passive voice, passive voice, passive voice and active voice, respectively.
B) Active voice, active voice, passive voice and active voice, respectively.
C) Passive voice, active voice, active voice and active voice, respectively.
D) Passive voice, active voice, passive voice and active voice, respectively.
E) Active voice, active voice, passive voice and passive voice, respectively.