Historians use terms such as A. D., B. C., decade, and century Question 1 options:

to identify ancient civilizations.

to refer to periods of time.

to help define the term odyssey.

to help us locate ourselves in space. 100 point going away :}

To refer to periods of time

Ad means in our time and bc means before christ

explanation:

the muslim keep their culture pure by finding new value

sir thomas more, venerated in the catholic church as saint thomas more, was an english lawyer, social philosopher, author, statesman, and noted renaissance humanist. he was also a councillor to henry viii, and lord high chancellor of england from october 1529 to 16 may 1532.