What should an Administrator suggest to implement this functionality?

Universal Containers (UC) is rolling out a new approval process. As the last step in the process after an Opportunity has been approved. UC wants to send a contract to its customer

for signature.

What should an Administrator suggest to implement this functionality?
A . Check the "Send PDF" box on the approval process setup.
B . Hire a consulting firm to develop a document signing framework.
C . Install an app from the AppExchange.
D . Utilize the Salesforce Autosign flow.

Answer: C