Which statement best distinguishes TCP from UDP in terms of reliability and flow control?

• A. TCP is connection-oriented with reliability, sequencing, flow control, and congestion control; UDP is connectionless, best-effort, with no guaranteed delivery or ordering.
• B. TCP is connectionless and best-effort with no guaranteed delivery or ordering.
• C. UDP provides reliability and ordering guarantees.
• D. TCP operates at the application layer.

Answer: (A)