[多选题]
Which two factors contribute to traffic starvation when TCP and UDP flows are included in a single traffic class? (Choose tow)
A. UDP FLOWS CONTINUALLY LOWER THEIR TRANSMISSION RATES WHEN CONGESTION IS DETECTED.
B. TCP FLOWS CONTINUALLY LOWER THEIR TRANSMISSION RATES WHEN CONGESTION OCCURS ON A LINK.
C. TCP FLOWS CONTINUALLY REDUCE THE WINDOW SIZE WEN CONGESTION OCCURS ON A LINK.
D. UDP FLOWS CONTINUALLY REDUCE THE WINDOW SIZE WHEN CONGESTION OCCURS ON A LINK.
E. TCP FLOWS MAINTAIN A CONSISTENT TRANSMISSION RATE WHEN CONGESTION OCCURS ON A LINK.
F. UDP FLOWS MAINTAIN A CONSISTENT TRANSMISSION RATE WHEN CONGESTION OCCURS ON A LINK.