Which of the following events separate geologic time into eras and periods?

a. the number of earthquakes that occur at that time

b. the appearance and disappearance of groups of organisms

c. the appearance and disappearance of volcanoes

d. the creation of new ocean ridges

Hin t in the section titled, "what can be done? " of "battling the digital jolly roger," what is one of the problems caused by piracy that the author lists? he section titled, "what can be done? " of "battling the digital jolly roger," what is one of the problems caused by piracy that the author lists? ow does the writer's point of view in "the completely free market" affect the credibility of the article? a. it's written in the third person, which allows the author to examine all sides of the debate. b. since it's written in the first person, it doesn't objectively present all sides of the argument. c. since it's written in the second person, it puts the reader in the writer's position, and gives the reader more to consider from this perspective. d. it's written in the first person, but is conducted as an interview with several different sources, providing a full-circle debate.

Tension between the british and boers was caused primarily by what things?

What event caused france and napoleon to want to get rid of its louisiana territory in north america? a) civil war b) seven years war c) slave revolt in haiti d) the french and indian war