Where were the four border states located in relation to the union and confederate states

Why have some historians rejected the labels bc and ad as laels for periods in world history

Plz ive been stuck on this question forever. in 1753 george washington was sent on a mission to a. build a fort at the point where the allegheny and monongahela rivers form the ohio river. b. attack the french at fort duquesne. c. attack the french at fort neccessity. d. deliver a message to the french demanding that they leave the ohio river.

What does this population pyramid indicate about denmark's recent population growth? a. it is relatively stable. b. it is rapidly shrinking. c. it is extremely unstable. d. it is rapidly expanding.