Assinale a alternativa que possui a sentença na VOZ PASSIVA

 Assinale a alternativa que possui a sentença na VOZ PASSIVA:a) We were experimenting with the use of s ound waves.b) It was a ver y low -tech star t .c) Madonna has now been replaced by high energy waves.d) All glass is weak be cause it crack s.e) Glass produc ts have microscopic crack s in them