Answer: (D) Synchronous
Explanation:
The synchronous communication is one of the type of real-time interaction such as phone and face-to-face communication between the two people.
The main benefit of the asynchronous communication is that it allow transmission of message and information between the sender and the receiver without any external type in the clock signal.
In the synchronous communication, the transmission of data or information are transmitted and received at the similar time.
Therefore, Option (D) is correct.