Which of the following is not a purpose of a national convention?
a) adopt the party's platform
b) begin planning the next convention in four years
c) pick presidential and vice-presidential candidates
d) unify the party behind those candidates for the upcoming election

Among the choices, C or this one makes he most sense i hope this helps is not a purpose of a national convention. The formal motivation behind a convention is to choose a nominee party for the President, and in addition to embrace an announcement of gathering standards and objectives known as the stage and receive the principles for the gathering's exercises, including the presidential designating process for the following decision cycle.