Passing data to multiple subproces

Hello,

I have been studying related topics for hours, but cannot make it work...

Process A (Returns1)

Process B, a reusable process ( I managed to pass the data of process A) (Inspect)

Process C a multiple resusable subprocess. (So far I dont get the data form process entity A) (Stock Handling)

In terms of business logic, there is a need to see the user history through the whole process. Because in process C the data of process entity A is not reached; this requirement is not met.

Thanks in advance!