Turn out all rooms

[Rich7]

Test No. incompl/inter-32 "Story (1)", question 8

The new owners had had to turn ......... all the rooms which were full of rubbish.

(a) to
(b) down
(c) into
(d) out

Test No. incompl/inter-32 "Story (1)", answer 8

The new owners had had to turn out all the rooms which were full of rubbish.

Correct answer: (d) out

Your answer was: incorrect
The new owners had had to turn down all the rooms which were full of rubbish.
_________________________

can you help me understand "turn out" in this sentence?

[Torsten]

If you turn out a room, you emtpy it, you remove the things inside including the rubbish.

TOEIC short conversations: Cancelling a stolen credit card

[Vara]

Hi,

why is here " new owners had had to turn down" can't it be "new owners had to turn down"?

thanks in advance..