정답: A
The best guideline to follow when attempting to avoid the exposure of sensitive data is to store sensitive data only when necessary. Sensitive data is a type of data or information that is considered or classified as confidential, private, or secret, and that can cause harm or damage to the data owner or the data subject, or to the organization or the business, if it is accessed or disclosed by unauthorized parties, such as hackers, insiders, or competitors. Sensitive data can include various types or categories, such as personal data, financial data, health data, or intellectual property data. Sensitive data can be exposed or revealed by various methods, such as a breach, which is a type of incident or event that occurs on a system or a network, and that results in the unauthorized access or disclosure of the sensitive data, and that compromises the confidentiality, integrity, or availability of the sensitive data. Sensitive data can be protected or secured by various methods, such as a guideline, which is a type of rule or principle that provides the direction, instruction, or recommendation for handling or managing the sensitive data, and that can be used as a reference or a standard for measuring or evaluating the compliance or alignment with the security requirements or regulations. Storing sensitive data only when necessary is a guideline that can be followed when attempting to avoid the exposure of sensitive data, as it can provide the benefits of both minimizing and securing the sensitive data, such as reducing the attack surface and exposure of the sensitive data, and enhancing the performance and security of the system or the network.
