Which statement correctly describes UPC and APC connectors in terms of end-face geometry and typical return loss performance?

• A. UPC uses a flat end-face with moderate return loss; APC uses an 8° angled end-face with much higher return loss (>50–60 dB).
• B. UPC uses an 8° angled end-face; APC uses flat end-face.
• C. Both have flat end-face with identical return loss.
• D. UPC has higher return loss than APC.

Answer: (A)