![](https://cos-cdn.shuashuati.com/pipixue-web/2020-1231-2005-12/ti_inject-812ce.png)
Three major documents involved in the fourth step are_________.
A.
a Letter of Intent, Articles of Association and a Charter
B.
a Letter of Intent, a Charter and a contract
C.
Articles of Association, a Charter and a contract
D.
documents of intellectual property rights, patent rights and export numbers