What overarching theme do ISO/IEC 27039, 27040, 27041, 27042, and 27043 share?

The correct choice is focused on the overarching theme of information security, which encompasses a comprehensive framework for managing sensitive data and protecting it from unauthorized access or breaches. The ISO/IEC 27000 series, including the standards mentioned (27039 to 27043), all play a significant role in establishing guidelines and best practices that organizations can follow to enhance their information security postures.

These particular standards address different aspects and methodologies related to the processes and practices that organizations should implement to safeguard their information assets. They cover areas such as security techniques, risk management, assessment of information security controls, and specific methodologies for conducting audits, which all contribute to the broader theme of securing information.

By focusing on information security, these standards help organizations ensure that their data is secured, managed properly, and compliant with regulatory requirements, making this choice the most relevant and encompassing in the context of the stated standards.

The other themes such as data management, cybersecurity assessment, and financial auditing do not encapsulate the wide-ranging goals and principles of information security as effectively as option C, which is why they are not the correct answer.