Answer:
D. Jesus' death on the cross was a sacrifice to atone for sins.
Explanation:
The atonement outlines the description of the sacrifice made by Jesus Christ to reconciliation between God and sinful mankind. When he has crucified the sins of all the world were taken by God. And therefore those who have faith in him would be forgiven for their sins. Wayne Grudem sums up this very well when he says that the atonement is the work that Christ during his life and death to earn of salvation humans.