Northern Trail Outfitters is having their regional supplier conference and wants to allow attendees to...

✅ Comprehensive and Detailed Explanation:

A (Keyword opt-in and SMS Messaging) is ideal because attendees can text a keyword to opt-in, and SMS provides instant, mobile-friendly, time-sensitive alerts like safety notifications or room changes.

❌ Why Others Are Incorrect:

B: Email and Smart Capture are too slow for live event updates.

C: CloudPages require internet access and form submission — not practical for quick opt-ins at live events.

D: Existing email subscriptions are static, not event-specific or real-time.

Exact Extract:

Salesforce Help: MobileConnect Keyword Setup

"Keywords enable mobile users to opt in to receive SMS messages. MobileConnect supports using keywords for event-specific opt-ins."

════════════════════════════════════════════