Which abbreviation refers to the time before the birth of christ?
a. c. e.
b. b.
c. c.
a. d.

The abbreviation which refers to the time before the birth of Christ is BC. The term Anno Domini (AD) is also employed and this is to denote the time immediately after the Death of Christ, seen with the terms employed above as well as After Death. The Gregorian Calendar is the most widely used calendar in the world today.