To Begin a Literature Review, What Initial Sources Would You

To begin a literature review, what initial sources would you use to locate information on your topic of interest?

A) Online search engines, journal archives in the local library, and recommendations from your supervisor or professor
B) Journal articles by nationally recognized researchers, health sciences publication indexes, and online search engines
C) Health sciences publication indexes, government and university literature databases, academic and hospital library resources
D) Textbooks, government and university literature databases, and online medical sites