What error has been made in this diagram?

Below is a business process model for a goods ordering process:

What error has been made in this diagram?
A . The arrowed flow mine from Fulfil order should go to the end node ( the bull eye) not to the task received:
B . The arrowed flow line from Complete order should go to check stock availability not to the decision diamond.
C . The task’Complete order’s should be In only one swimlane, as tasks straddling two swim lanes are not permitted.
D . The task’ Cancel order’ should be rename Order cancelled as by this point in the process the order has been cancelled.

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Answer: B