Final answer:
Stephanie's mom advises her not to do academic research on websites ending in '.com' because they are likely for-profit companies or sites.
Step-by-step explanation:
Stephanie's mom's advice not to do academic research on websites ending in '.com' is likely because these sites are likely for-profit companies or sites. In contrast, websites ending in '.org' are more likely to be not-for-profit organizations, while websites ending in '.edu' are typically educational institutions. By avoiding '.com' websites, Stephanie can focus her research on more reliable and authoritative sources for academic purposes.
Learn more about the reason for avoiding academic research on websites ending in '.com'