From “the telephone: a truer tale,” how did antonio and alexander graham bell differ?

While Bell gets all the credit for inventing the telephone, it was actually Antonio Mueci who first invented the telephone, first tried out in Cuba while Bell was still a small child. In a court case though about patents on the telephone the judge said Antonio only had a mechancical telephone not an electrical one, though historically he was described as having an electrical transmission in the trial in Cuba.

The correct answer is c