Which one cannot be used as a start point to initiate a new instance of a process?

Which one cannot be used as a start point to initiate a new instance of a process?

A.
Initiator User Task

B.
Call Task

C.
Receive Task

D.
Message Start Event

Explanation:
Incorrect answer:
C: The send task is frequently paired with the receive task to invoke a process or service and
receive a response in return.
D: The message start event triggers a process instance when a message is received.