There is no precise way to define the goal of a communication therefore all the given statements are correct.
What is a communication?
Communication is a circular process by which people exchange ideas, emotions, opinions and views in order to connect with each other and to share information.
Goal of the communication can be define as the purpose for which the communication was initiated.
The first sentence reflects the goal as to persuade and initiate team work.
The goal in the second sentence is to inform and question the members in order to ensure their involvement.
The goal of the third sentence is to inform.
Therefore the correct option is d.
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