70 years old.
There was a 44-year age difference between the youngest and oldest signers. The oldest signer was Benjamin Franklin, 70 years old when he scrawled his name on the parchment.
E. Alexander Graham Bell was born 141 years before Alexander Graham Bell, so he was never able to telephone his neighbors.
Because in the end all names would be changed Alexander Graham Bell.
The year was B . 1790 is 1790
answer: it's d