Which of the following is the MOST challenging issue in apprehending cyber criminals?

The most challenging issue in apprehending cyber criminals is that the crime is often committed from a different jurisdiction. This means that the cyber criminals may operate from a different country or region than the victim or the target, and thus may be subject to different laws, regulations, and enforcement agencies. This can create difficulties and delays in identifying, locating, and prosecuting the cyber criminals, as well as in obtaining and preserving the digital evidence. The other issues, such as the sophistication of the methods, the integrity of the evidence, and the lack of physical evidence, are also challenges in apprehending cyber criminals, but they are not as significant as the jurisdiction issue. References: CISSP All-in-One Exam Guide, Eighth Edition, Chapter 4: Security Operations, page 475; Official (ISC)2 Guide to the CISSP CBK, Fifth Edition, Chapter 4: Communication and Network Security, page 544.