The best group of people for Lakeesha to survey in order to find out what percentage of the people in her town speak more than one language is:
B. 100 people randomly selected from the telephone book.
This option provides a random sample of the general population in her town, which is more likely to yield results that are representative of the entire community's language skills. The other options are biased towards specific groups (e.g., language learners, university faculty, or those responding to an advertisement), which may not accurately reflect the overall population's language abilities.