In the K2 Five (5.2; 5.1) version, when designing the process, there is no possibility to provide information on the decision made (Action Result property).

In earlier versions 4.7 and earlier such functionality existed and could be passed as a process field. After obtaining the information, these data are only selectable in the K2 Five 5.3 version.

I attach the information from K2:

https://help.k2.com/onlinehelp/k2five/userguide/5.3/default.htm#Whats-New-Five/Whats-New-Five.htm

https://help.k2.com/onlinehelp/k2five/userguide/5.3/default.htm#How-Tos/WorkflowTaskActionResult/Workflow-Task-Action-Result.htm

We need this functionality in versions of K2 Five 5.2 - in particular in this version where it is used by most customers