Choose the correct option.
1. We talked to a woman who / whose house had been destroyed.
2. They live in a region where / which there are a lot of wildfires,
3. The disaster, that/ which struck unexpectedly, has devastated the economy
4. The medical facilities what / that are now available are insufficient.
5. The food aid, much of whom / of which was sent by plane, is still waiting at the airport​