When is a concurring opinion written?

Responses
A when a supreme court justice agrees with the majority decisionwhen a supreme court justice agrees with the majority decision
B when a supreme court justice disagrees with the majority decisionwhen a supreme court justice disagrees with the majority decision
C when a supreme court justice cannot decide on a case due to personal reasonswhen a supreme court justice cannot decide on a case due to personal reasons
D when a supreme court justice votes with the majority but for different reasons

A. when a supreme court justice agrees with the majority decision