"Nothing About Us Without Us"

Book assignment: "Nothing About Us Without Us, " that examines the socio cultural and political-economic contexts of the international disability rights movement;"

Which do you believe is the most influential force that shapes the day to day lives of people with disabilities around the globe: a) social and cultural beliefs/assumptions, b) political and economic conditions, or c) one's body and it's physical abilities/limitations? And, why do you believe this? (Be sure to cite evidence from the book, not just your own opinion.)