Ahmad, a system administrator in an organization, is setting up new Active Directory domains for the Marketing and Sales teams in the organization. Previously, all the marketing and sales employees worked as a single team. Recently, the employees in these teams were reorganized into two separate teams. He is setting up Active Directory domains on Windows 2019 Server to reflect the organizational structure. What is the minimum number of domain controllers that Ahmad should add to the Marketing domain?
a. Zero
b. One
c. Two
d. Three