What should the architect recommend for optimal use of Salesforce functionality and also to avoid data loading issues?

Universal Containers (UC) is a business that works directly with individual consumers (B2C). They are moving from a current home-grown CRM system to Salesforce. UC has about one million consumer records.

What should the architect recommend for optimal use of Salesforce functionality and also to avoid data loading issues?
A . Create a Custom Object Individual Consumer c to load all individual consumers.
B. Load all individual consumers as Account records and avoid using the Contact object.
C. Load one Account record and one Contact record for each individual consumer.
D. Create one Account and load individual consumers as Contacts linked to that one Account.

Answer: C