Which of the following is the option that you should select?

You are employed as a developer at ABC.com. ABC.com has a single Active Directory domain,
named ABC.com.
You have created an App for Office SharePoint app. you want to make sure that the app can be
seen in a Word document.
You have accessed the App for Office 2013 dialog window.
Which of the following is the option that you should select?

A.
The Mail pane app in: option.

B.
The Content pane app in: option.