The correct answer is email, as it enables two-way communication between accounts. Other options like answering services, automatic routing units, and fax machines do not provide this interactive capability. Email facilitates the exchange of messages, making it the best choice for internet-based communication. ;
The best choice for a two-way form of internet-based communication is B. email, as it enables users to send and receive messages. This interactive exchange is crucial for effective communication. Other listed options do not provide this capability.
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