1. Adobe Commerce Merchant Documentation
Product Attributes
Attribute Scope: "The scope of an attribute is the level in the store hierarchy where the value of the attribute can be set... If you have a multistore setup
you can set the scope of an attribute to Store View to have a different value for the same attribute in different stores. The value for the more specific level overrides the value of the more general level." This directly supports the explanation that a Store View value overrides a Global value.
2. Adobe Commerce Developer Documentation
Architectural Deep Dive
Scopes: "Magento allows you to set a different value for the same entity for different scopes. The scopes are represented by a hierarchy: Global -> Website -> Store. The value of the setting for a more specific scope (store) overrides the value for a more general scope (global)." This confirms the hierarchical override behavior described in the correct answer.
3. Adobe Commerce Merchant Documentation
Content Staging
Scheduled Changes: This documentation describes Scheduled Changes as a tool to "create a set of content changes that are published to your live site at a specific time
" confirming it is an optional feature for campaigns
not a mandatory step for every product update.