CompTIA Network+ N10-006 Q497

A network technician is troubleshooting a WAN link that traverses a 100-foot span of RG6. The technician utilizes a Time Domain Reflectometer (TDR) to proof the cable during the troubleshooting process. The TDR returns a trace that drops off suddenly at 51
feet (15.54 meters).
Which of the following is this indicative of?

A. Open
B. TX/RX reverse
C. Short
D. Crosstalk

Correct Answer: A