Which Selection Procedure(s) Would Be MOST Likely to Yield a Random

Which selection procedure(s) would be MOST likely to yield a random sample of voters' opinions toward capital punishment in the state of Texas?

A) randomly selecting voters registered in the smallest and largest voting districts
B) randomly selecting voters who visit the polls on election day in all voting districts
C) randomly selecting voters from the complete list of all registered voters
D) All of these selection procedures would be equally likely to yield a random sample.