"When vacancies happen in the Representation from any State, the Executive Authority thereof shall issue Writs of Election to fill such Vacancies."—Article I, US Constitution

What would happen if a senator or representative from Florida resigned or left office for some reason, according to this quote?

a) The governor of the State would call for an election to replace the senator or representative.

b) The president would call for a national election to replace the senator or representative.

c) Members of the president's bureaucracy would organize an election to take place in that state.

d) Members of the state legislature would elect someone from their group as a replacement.