Samuel Morse helped spark a revolution in communications. Mark the statement if it describes one of Morse's contributions.

A.
He developed the semaphore system, thereby revolutionizing communications.

B.
He invented the electric telegraph that transmitted information instantaneously.

C.
He devised a code of dots and dashes for sending messages over the wire.

D.
The first telegraph line ran from Philadelphia, Pennsylvania, to New York City.

E.
Telegraph wires spread across the continent by following railroad tracks west.