Which three standard Salesforce objects should be used in this experience?

A company provides a way for customers to shop for homes and contact real estate agents online. The company’s brokers use some of the Salesforce standard functionality to track home buyers.

Which three standard Salesforce objects should be used in this experience? Choose 3 answers
A . Property
B. Lead
C. Contact
D. Opportunity
E. Address

Answer: B,C,D