Universal Container require all customers to provide either a phone number of an email address when registering for an account. What should the data…

Using a validation rule is the best way to ensure that all customers provide either a phone number or

an email address when registering for an account, as it allows defining a formula that evaluates

whether a record meets certain criteria. Using required fields may not work if both phone number

and email address are required. Using an Apex class or a Process Builder may be more complex or

cumbersome than using a validation rule.