Respuesta :
The sentence that is correctly written is option C. In June 1776, Thomas Jefferson wrote the first draft of the Declaration of Independence that was formally adopted by Congress on July 4 of that year. We used the demonstrative pronoun "that" because it refers to the noun "Draft of the Declaration of Independence".
I cannot see all of option D. However, among the other 3 options the answer is C. The "that" is bringing together the two clauses.