How did samuel morse revolutionize communication in the 1800s? a. he developed alternating current. b. he invented the electric telegraph. c. he invented the telephone. d. he proved that steam could power machines. (3 pt) how did samuel morse revolutionize communication in the 1800s? a. he developed alternating current. b. he invented the electric telegraph. c. he invented the telephone. d. he proved that steam could power machines.