Please help me it history

b. native americans them

2018 means 2018 ce or common era

there have been other eras too including bce, which included way more years.

i believe the answer to your question is b. pay your bills early

there were 6 major base camps.   the base camps were located in alva, fort reno, fort sill, the madill provisional internment camp headquarters, mcalester and camp gruber.