The constitution made no mention of how many justices should sit on the supreme court. which statement regarding how the number of justices is set is true? a. the first congress set the number of justices as a part of the judiciary act of 1789. b. the constitution gives the executive branch the authority to set the number of justices. c. the country votes every six years on the number of justices that will make up the court. d. the number of justices is set by a vote from influential judges in the different constitutional courts.