Humans Are the Genus Homo

Humans are the genus Homo. Is it true that only Homo sapiens have ever existed, or were there other "people" around at some point, with whom we had to compete?

A) It is true that we are the only species in the genus Homo.
B) There have been other "people" in our evolutionary history, but we never existed alongside them so we never competed. We came later.
C) There have been several other species in the genus Homo, but they lived in different places than our Homo sapiens ancestors, so we never competed with them.
D) Early Homo sapiens competed directly with Homo neaderthalensis and won.
E) There's no way to know whether there were ever other "people" on Earth.