The correct answer is "He wants to make it something that most people will agree to to- so they need to stick to the primary issue of Independence without bringing in other hot button issues."
Dr. Franklin suggested changes like removing the issue of slavery and making the document sound less like something you would hear in church because he wanted to make it something that most people will agree to, so they need to stick to the primary issue of Independence without bringing in other hot button issues.
Let's remember that in the last part of his life, in 1789, he started to write about the issue of slavery. He wrote about his opposition to slavery. Indeed, one of the last public things he did was to send a petition to the United States Congress to abolish slavery in the county.