Which of the following statements is CORRECT about the stem cell research？A．Embryonic stem

Which of the following statements is CORRECT about the stem cell research？

A．Embryonic stem cells are changeable even in the late stage.

B．Growing new hearts in a patient needs stem cells from an adult donator.

C．Research findings by a Japanese scientist might end the controversy.

D．President Obama agrees with George Bush concerning the issue.

请帮忙给出正确答案和分析，谢谢！