Final answer:
The last name of George, who came to California for gold and built a family fortune that included a publishing empire, is Davis.
Step-by-step explanation:
The last name of George, who came to California for gold and built a family fortune that included a publishing empire, is b) Davis. During the California Gold Rush in the mid-19th century, many people migrated to California in search of quick riches. George Davis was one of the individuals who found success and wealth amidst the Gold Rush.