Which of these sentences is written correctly?
1) Booker T Washington was born into slavery on April 5, 1856, on a farm in Virginia.
2) Booker T. Washington was born into slavery on April 5, 1856, on a farm in Virginia.
3) Booker T Washington was born into slavery on April 5, 1856, on a farm in Virginia.
4) Booker T. Washington was born into slavery on April 5, 1856, on a farm in Virginia.
