It won out in the final round of counting, securing 6,017 (52.48%) votes to 5,448 (47.52%) who favoured a hybrid system keeping district representation.
Option D - four districts - fell during the first round of counting and E, rolling island-wide elections every two years, fell quickly after.
The status quo was then eliminated.
The referendum used preferential and transferable voting.
How the voting went:
Option A: 5,304 Option B: 3,486 Option C: 3,760 Option D: 672 Option E: 940
Option A: 5,390 Option B: 3,761 Option C: 3,914 Option E: 1,004
Exhausted papers: 93
Option A: 5,755 Option B: 3,898 Option C: 4,220
Exhausted papers: 289
Option A: 6,017 Option C: 5,448
Exhausted papers: 2,697
The first stage of the count today at St James was to reconcile ballots cast both at polling stations and through the post against registration records to then be able to work out the turnout.
A 40% turnout threshold had been set to guarantee the States would enact the outcome.
In total 14,370 people cast a vote yesterday, 45.1%.