Email-to-Case is a standard Salesforce Service Cloud feature that automatically converts customer emails into Case records . Since Universal Containers already uses social media, chat, phone, and SMS through Digital Engagement , adding Email-to-Case would complete a traditional multichannel service strategy by enabling customers to contact support through email.

Option A (AppExchange) is a marketplace for solutions but not a direct communication channel.

Option C (Salesforce Inbox) is designed for sales productivity and email integration for sales reps, not for customer support case creation.

Referenced Salesforce Materials:

Service Cloud Consultant Exam Guide – Interaction Channels Domain.

Salesforce Help: “Set Up Email-to-Case to Create Cases from Customer Emails.”

Salesforce Trailhead: “Route Customer Emails to Cases.”