C) xenophobia. Explanation: The root "phobia" means fear. For example, arachnophobia is combined of the roots "arachna" which means spider, and "phobia", and therefore means fear of spiders. The root "xeno" comes from the Greek word xénos, which means stranger. Therefore, combining the roots "xeno" and "phobia" gives you the word xenophobia, which means a fear of strangers or foreigners.