In order to configure a bot to connect to a specific channel, you execute the following steps in Azure: Step 1: Log in to Azure Portal.
Step 2: Choose the bot for configuration.
Step 3: In the Bot Management, select Channels.
Step 4: Select the required channel to integrate Bot into Mobile or Web Application.
Which channel would you use to meet the requirements as given in Step 4 above? [choose one option]

Answer options:

A.Slack
B.Microsoft Teams
C.Direct Line
D.Office 365 email

Correct Answer: C
Option A is incorrect because this channel selection will configure user communication using Slack.
Option B is incorrect because this channel selection will configure user communication through Microsoft teams.
Option C is correct because this channel selection will integrate your bot into your web or mobile application.
Option D is incorrect because this channel selection will configure user communication via Office 365 email.
Reference:
To learn more about connecting a bot to channels, use the link given below: 

https://docs.microsoft.com/en-us/azure/bot-service/bot-service-manage-channels?view=azure-bot-service-4.0