What is the relationship between Accounts and Contacts in Salesforce?

Correct answer: One-to-Many

Option D is correct because in Salesforce, the Account-to-Contact relationship is a standard one-to-many relationship, meaning a single Account can be associated with many Contacts, but each Contact's primary account lookup points to one Account. Option A is incorrect because a self-referential relationship is one where an object relates to another record of the same object type, such as the Account hierarchy, not the Account-Contact relationship. Option B is incorrect because a one-to-one relationship would mean each Account could have at most one Contact, which does not match Salesforce's data model. Option C is incorrect because a many-to-many relationship requires a junction object; the standard Account-Contact relationship does not use a junction object and is therefore not many-to-many.