hey, i was wondering the same thing so i went on CB and read about the score choice.. here is what it said:
If you so choose, you can send the scores you feel best
demonstrate your abilities—at no additional cost. Score
Choice™ allows you to select which scores to send each
college by test date for the SAT and by individual test taken
for SAT Subject Tests™. You can choose scores from one,
several or all SAT test dates in your record.
Score Choice is optional. If you decide not to use it, we
will send all of your scores to the institutions you select to
receive your scores.
The College Board has worked with colleges and universities
to make it easier for you to know which scores you should
send to each institution. Take a look at the score-sendingscreens at www.collegeboard.com/satscores
^^So yeah if you do poorly you can use score choice for SAT II's, but when you go to the score choice page, it says it kind of depends on the school. Some schools "require" you to send in all the scores.. I dont know if that means you ABSOLUTELY have to, or it is recommended..