（）Which of the following statement are correct as a specific purpose?

（）Which of the following statement are correct as a specific purpose?
A.donate blood.
B.to persuade my audience to donate blood.
C.to inform my audience about Guilin.
D.to inform my audience about the major tourist attractions in Guilin.
正确答案：to persuade my audience to donate blood.；to inform my audience about the major tourist attractions in Guilin.