The first question is

 ?How do you activate the 'Dropshipping' feature in Odoo

1 - Sales> Configuration > Settings > Activate 'Dropshipping > Save

2 - Purchase > Configuration > Settings > Activate 'Dropshipping'> Save

3 - Inventory > Configuration > Settings > Activate 'Dropshipping' > Save 

4 - Manufacturing > Configuration > Settings > Activate 'Dropshipping' > Save

Why is the answer 3 not true?