A solution package is a set of XML files and folders that are the artifacts of a solution. The package contains a Solution Definition File (SDF), a Process Engine (PE) Configuration File, a Workflow Definitions, and a "Pages" folder. What is the file that contains the application space, roster, event logs, queues, in-baskets, roles, and step processors?
A. PE Configuration File
B. Solution Definition File
C. Workflow Definition File
D. Workflow Collection File