Answer: (A), (C) and (E)
Step-by-step explanation:
The custom link is the type of short URL ( Uniform resource locator) that can be used before sharing and customize itself in the system. In the salesforce, the customize buttons and the customize link are used for defining the external system by using the data in the salesforce.
It basically interface the salesforce data with various types of external URL and applications. The process for updating the current record and creating the record page are mainly accomplished by using the custom link in the system.