The main difference between the Readers' Guide to Periodical Literature and resources like EBSCOhost and Expanded Academic ASAP is that the Readers' Guide is A. only accessed in a library, while the other resources can be accessed online from anywhere. B. older and more comprehensive than the newer, online indexes. C. a basic index, while the other resources are full databases allowing access to actual articles. D. more universally accepted in an academic setting than the other indexes.