The APT_SubProcessOperator is used for what purpose?

A.
It allows you to incorporate a third-party executable into the framework

B.
It provides the capability to break predefined operatorsinto sub processes

C.
It provides the capability to define custom operators at the sub process level

D.
It allows you to incorporatecomposite operators, which contain more than one operator

Explanation:
https://www- 01.ibm.com/support/knowledgecenter/SSZJPZ_11.3.0/com.ibm.swg.im.iis.ds.pxop.dev.doc/topics/
creatingopers.html