Question

Пасивный залог the rooms ... And looked tidy
A. were cleaned
B.cleaned
C.were cleaning
D.are cleaning

Answer 1

The rooms were cleaned and looked tidy.

cleaned не может быть, т.к. в пассивном залоге всегда присутствует глагол "be" в любой форме.

were cleaning не может быть, т.к. в пассивном залоге Past Simple Progressive пишется "was/were+being+V3".

are cleaning не может быть, т.к. в пассивном залоге Present Simple Progressive пишется "am/is/are+being+V3".

Answer 2

The rooms A. were cleaned and looked tidy.