Which of the following is a true statement about judges in the U.S. court system?

AAll judges are appointed at both the state and federal levels of the court system in the United States.

BJudges are appointed at the federal level, and the system for selecting judges differs by state government.

CAll judges are elected at the both the state and federal levels of the court system in the United States.

DJudged are elected at the federal level, and the system for selecting judges differs by state government.