What is the recommended solution for integrating these applications into Salesforce?

Universal Containers (UC) has many existing applications, including Salesforce, that their users access. UC would like to integrate these applications with Salesforce so that users can accomplish all of their tasks in one user interface.

What is the recommended solution for integrating these applications into Salesforce?
A . Set up the external applications as Connected apps into the Salesforce user interface.
B . Use streaming API to integrate these applications into the Salesforce user interface.
C . Set up the external applications as Canvas apps into the Salesforce user interface.
D . Connect the external applications into the Salesforce user interface using Salesforce Connect.

Answer: C