A is the correct option. So a 100% vote takes 2% of your Steem Power. You recover 2% every 2.4 hours, that's a 20% daily. You can give 10 votes every day. When you reach 500 SP you will be given the slider to give a lower percentage vote with this option you can split your vote weight as many times as you wish. Like 50 votes of 20% a day.