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$.$

Two

c$.$

One

d$.$

Three