Which prerequisite should the consultant consider before enabling Opportunity Splits?

Universal Containers is analyzing data to identify gaps, and wants to know which Accounts with open Opportunities are missing Contacts. What should a consultant recommend to build this report?

Cloud Kicks wants sales reps to see product recommendations and next-best-action suggestions based on historical opportunity data using AI. What should the consultant recommend?

The sales director at Cloud Kicks wants to prevent users from viewing each other's Opportunities but wants them to check to see that the Account already exists prior to creating a new Account.
Which organization-wide default should the consultant recommend?

Cloud Kicks (CK) has hired a consultant to help enhance its current Salesforce implementation.
What should the consultant do first to help CK meet its business requirements?