Explanation
Private-browsing mode is the best option to mitigate the risk of customer data being accidentally saved to the kiosk. Private-browsing mode prevents the browser from storing cookies, history, passwords, and other data that could reveal the customer's identity or preferences. Manually clearing browsing data is not a reliable option, as it depends on the customer's awareness and willingness to do so. Browser data synchronization and password manager are features that could actually increase the risk of customer data being exposed, as they could sync or autofill sensitive information across devices or accounts. References:
Official CompTIA learning resources CompTIA A+ Core 1 and Core 2, page 12 Certification Study Guides and Books | CompTIA IT Certifications, CompTIA A+ Core 1 220-1101 Certification Study Guide, page 234