Read the sentence. I had to prove my identity to gain entrance to the building I was required to fill out an impressive number of forms. What is the best way to revise the sentence? I had to prove my identity to gain entrance to the building, I was required to fill out an impressive number of forms. I had to prove my identity to gain entrance to the building; I was required to fill out an impressive number of forms. I had to prove my identity, to gain entrance to the building I was required to fill out an impressive number of forms. I had to prove my identity: to gain entrance to the building I was required to fill out an impressive number of forms