Final answer:
Ronald should use 'incognito mode' for transactions and 'private' browsing on public computers to protect personal information and ensure data security.
Step-by-step explanation:
Ronald attended a seminar about the best practices to use when browsing the Internet. The presenter used the following statement in his discussion: “When using a public computer for browsing the Internet, try to use incognito mode for transactions. Also, use private browsing whenever you can.”
Using incognito or private browsing modes helps protect your personal information and browsing history on public computers. It is also advisable to avoid conducting transactions that require sensitive data such as credit card numbers, unless necessary, and to ensure that the website is secure (look for HTTPS in the URL).