How Does the Route Community Attribute Set by Routing Policies

How does the route Community attribute set by routing policies affect route selection?

A) The Community attribute directly affects route selection, because it must be compared in route selection.
B) The Community attribute does not affect route selection, because it is a non-transitive attribute and cannot be transmitted between routers.
C) The Community attribute indirectly affects route selection. Routes are classified by the Community attribute. Different route attributes such as the Local-Preference and MED can be set for routes in different communities, which affects route selection.