What does a consultant need to enable and deploy before using Advanced Mapping in NPSP?

A nonprofit organization has a large volume of donation and payment data that it wants to migrate to its NPSP org. Which two large volume data considerations should the consultant discuss with the nonprofit organization? Choose 2 answers

A nonprofit organization is using NPSP to manage its contacts and their families. What should the consultant recommend about adding other common connections such as siblings and deceased and divorced spouses?

A nonprofit stores a government-issued personal identification number on each constituent's Contact record in an encrypted field.
What should a consultant enable on a Permission Set to ensure the personal identification number is fully accessible by a subset of org users'?

What is a common cause of the NPSP upgrade failing when run in Production and there were no issues running it in the sandbox?