How should a consultant install NPSP in an existing Salesforce organization?

How should a consultant install NPSP in an existing Salesforce organization?
A . Download each NPSP component from the AppExchange, install in the target organization, and complete the post-install instructions
B. Visit the NPSP Installer page, install in the target organization, and complete the post-install instructions
C. Download each NPSP component from The Powrt of Us Hub, install organization, and complete the post-install instructions
D. Visit the NPSP Conversion Utility tool, install in the target organization, and complete the post-install instructions

Answer: B