选B.
这里符合条件的只有A.B两项,它们的区别是:
（1）find out
find (sth) out(经研究或询问)获知的(某实物)Can you find out what time the train leaves?你能查问出火车什么时候离开吗?
find sb out 发现某人做错事、说谎等：He had been cheating the taxman but it was found out.他一直在欺骗税务局,但多年之后才被查出.
（2）pick out
pick sb/sth out
（a）挑选出某人[某事物]She was picked out fome thousands of applicants for the job.从数千申请人中条选出她来做那份工作.
（b）分辨出某人[某事物]It was just possble to pick out the huton the side of the mountain.那小舍座落在山边,隐约可见.