Election officers are chosen by the:

a.) people
b.) election board
c.) national convention
d.) caucus

B) Election Board

The election board (also called election commission) of a jurisdiction is the body that is responsible for implementing election procedures, including choosing the election officers. In most federations (including the United States), there are separate bodies for each subnational government (in other words, each state has its own board).

i told you before its c