Which phrases give accurate definitions of history? Select all correct answers.

A. the study of human behavior before records were kept

B. a documented narrative of change over time

C. the study of the human past

D. the study of how people have used their environment

(d) rivers.

explanation:

civilizations developed around rivers because their waters provided places to hunt and fish. also, as the rivers flooded, the lands around them became fertile. this allowed them to support farming. this is especially true of the nile river, which flooded the same time each year.

the effect of the ming leaders banning ships with more than two masts was that there was no further construction of ships masts, because there was a surplus. ming emperors disallowed foreign exploration