The correct answer is A. Samuel Morse
Explanation:
Samuel Morse was an American inventor mainly known for supporting the creation of the telegraph that was a message and communication system as well as creating the Morse Code that was a code based on dots and dashes used to sent messages through the telegraph. In 1844, Morse sent the first message was sent using the Morse Code through the telegraph and this message was "What God Hath Wrought?" that an excerpt from the Old Testament in the Bible. According to this, it was Samuel Morse the one that tapped out the message "What God Hath Wrought?".
