Turn out all rooms

Test No. [color=blue]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. [color=blue]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: [color=red]incorrect
The new owners had had to turn down all the rooms which were full of rubbish.
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can you help me understand “turn out” in this sentence?

If you [color=blue]turn out a room, you emtpy it, you remove the things inside including the rubbish.[YSaerTTEW443543]

TOEIC short conversations: Cancelling a stolen credit card[YSaerTTEW443543]

Hi,

why is here " new owners had had to turn down" can’t it be “new owners had to turn down”?

thanks in advance…