Final answer:
In the case of In re Gault, the U.S. Supreme Court ruled that juvenile defendants have the right to an attorney, among other rights.
Step-by-step explanation:
In the landmark Supreme Court case of In re Gault, the Court extended several important rights to juveniles accused of delinquency. The case specifically ruled that such juveniles have the right to a notice of charges, the right to legal counsel, the right to confront and cross-examine witnesses, and the right against self-incrimination.
Therefore, of the options provided, the right to an attorney is the right that was directly addressed and guaranteed by the In re Gault decision. This ruling reflected the broader trends initiated by other precedence setting Supreme Court cases such as Gideon v. Wainwright, which guaranteed the right to legal representation for all accused of serious crimes, and Miranda v. Arizona, which established mandatory advisement of rights including the right to counsel and the right to remain silent.