Which statement is true about the STP Path Cost on a particular port?

Which statement is true about the STP Path Cost on a particular port?

A.
When increased, it can provide higher bandwidth to a connecting port.

B.
It can be modified to help determine Root Bridge selection.

C.
Modifying it can cause TCN BPDU to be sent to the Root Bridge.

D.
It is known only to the local switch where the port resides.