Subscription1 contains a virtual network VNet1 in resource group RG1. User1 currently has Reader, Security Admin, and Security Reader roles. What action lets User1 assign the Reader role for VNet1 to others?

To assign roles, a user needs the Microsoft.Authorization/roleAssignments/write permission. The Owner role includes this permission, allowing User1 to assign roles, such as the Reader role, for VNet1. The Contributor role for VNet1 would allow User1 to manage VNet1 resources but not assign roles. Removing User1 from Security Reader and Reader roles and assigning Contributor for the subscription would grant broader permissions than necessary. Assigning Contributor for RG1 after removing Security Reader from the subscription is also insufficient, as Contributor doesn't grant role assignment permissions. Therefore, assigning the Owner role specifically for VNet1 is the most precise and effective solution.