There are some following statements that are true regarding this. The first one is B. The second true statement is D. F is also another true statement. These statements will not be easy to understand unless you know what IEEE 802.1D is. This is known as a standard that will contain specifics regarding different processes that may occur.
This used to be a standalone standard but back in 2014, it started to become a part of Dot IQ. It may not be officially withdrawn right now but the time may come when it would just be remembered as one of the standards in the past. Take note that this is related to spanning tree protocol and multiple spanning tree protocol.
All ports on the root bridge are Designated ports All ports on the root bridge are Forwarding Spanning tree will choose the path with the lowest root path cost