Which type of relationships can be defined with external objects? Choose 2 answers

Ursa Major Solar's sales team has been struggling to enter data on mobile since rollout; the team dislikes scrolling through all of the fields to input only the necessary data.
How could the app builder solve this with minimal impact to desktop users?

The VP of Marketing wants to broadcast an email to 10,000 contacts in Salesforce on a regular basis, but realizes Salesforce's mass email functionality has a limitation on the number of emails that can be sent each day.