Question

Justices who disagree with the decision of the Supreme Court may explain their reasoning with a ____________.

Answer 1

It is concurring opinion because 
"In law, a concurring opinion is a written opinion by one or more judges of a court which agrees with the decision made by the majority of the court, but states different (or additional) reasons as the basis for his or her decision."

Answer 2

concurring opinion //////////////////////////////////