What form of research provides the best evidence of the evolutionary relationship between two hominid species?

Question

anonymous · Answer

the choices are: 

Documentaries on the development of language in hominids

 Maps depicting the geographic location of different hominids

 Articles on the use of tools by hominids

 Studies in comparative anatomy of different hominids

anonymous · Answer

Maps, surely.  Studies, articles and documentaries would take away from those maps which were created by the researchers, hopefully. ^^