![](https://cos-cdn.shuashuati.com/pipixue-web/2020-1231-2005-12/ti_inject-812ce.png)
PPL scientists will try to solve their problem by
A.
removing the sugar molecule on the surface of pig cells.
B.
distinguishing human tissues form. those of pigs.
C.
using the sugar-free nucleus in cloning a pig.
D.
taking out the sugar genes from the cell of a pig.