The increasing complexity of attacks on corporate networks is a direct result of more and more corporate employees connecting to corporate networks with mobile and personal devices. In most cases…

This option incorrectly states that BYOD results in a 'smaller network attack surface' - in reality, personal devices significantly expand the attack surface.

Confidentiality leaks through cell conversations and 'availability of remote corporate data' are not primary BYOD security risks in an enterprise context and conflate telephony concerns with network security.

Data exfiltration via personal devices, loss of sensitive corporate data through theft or loss of mobile devices, and increased data leakage at the network perimeter are the core, well-documented risks of BYOD. This option accurately pairs these risks with appropriate mitigations such as MDM policies, remote wipe capability, and data loss prevention controls.

While device theft is a valid risk, 'minimal device storage' and 'call quality' are not security risks and are irrelevant to a corporate network security threat model.