Although this is of course subjective, Humanism is generally thought to be a positive, "good" movement in that it takes the focus away from supernatural, unknowable powers and places it on humans themselves.
The correct answers are 1 and 2. A scientist is guided by their curiosity. The investigation allows the scientist´s curiosity to develop studies through both objective and subjective questions. The scientist goes beyond the answers, they seek to understand why and the impact of the answers.
Answer:
The date marking the end of prehistory is typically defined as the contemporary Written historical record for example in Egypt it is generally accepted that pre history ended around 3200 BCE
I'm a bit rusty on this portion of history, sorry, but I believe the answer you're looking for is because George Washington wasn't in Philadelphia at the time of the signing. He was a general in the army and during the time of the signing, he was defending the country in another part of colonies.
Hope this helps!