![](https://lstatic.shangxueba.com/jiandati/h5/images/m_q_title.png)
A.He wanted to prevent himself from suffering from vitamin B12 deficiency.B.He was ser
A.He wanted to prevent himself from suffering from vitamin B12 deficiency.
B.He was seriously ill with vitamin B12 deficiency.
C.He .wanted to cure his family members of an inherited disorder.
D.He was curious about the latest medical development.