You are a Microsoft Teams administrator for your company. The company creates a new Microsoft Teams app named App1. A developer packages App1 as a ZIP file. You need to ensure that App1 can be uploaded as a ZIP package to Microsoft Teams. Which Apps setting should you turn on? 

Answer options:

A. Allow uploading custom apps.
B. Enable new external apps by default.
C. Enable default apps.
D. Allow external apps in Microsoft Teams.

A

Reference: https://docs.microsoft.com/en-us/microsoftteams/platform/concepts/deploy-and-publish/overview