Different choices for post rewards (50%/50%, Power Up 100%, Decline Payout)

What are the different choices for post rewards (50%/50%, Power Up 100%, Decline Payout)?

50%/50%::
This rewards in half STEEM Power, and half liquid STEEM / Steem Dollars. The ratio of liquid STEEM to Steem Dollars rewarded is based on network conditions at the time of payout. This is the default payout option.

Power Up 100% ::
This option rewards the post in 100% STEEM Power.

Decline Payout::
Use this option to receive no post rewards. Votes will affect the post's position on the trending ranking but no rewards are paid from Steem's reward pool. Replies made to the post are still eligible for rewards.