From 1000-1500 A. D., how did cities like Cairo change? Select all that apply a. They were places of cultural and philosophical exchange. b. You could find exotic pets and spices in their markets. c. They had caravansaries. d. They sold goods from India and Spain. e. They closed their doors to further cultural influence.

"choosing is refusing" means individuals face an opportunity cost with each decision they make. economists state that every decision involves trade-offs. opportunity cost is the least desirable alternative given up as a result of a decision.

c

explanation: because you need to reduce the pollution on land,the exhaust fumes will stop,and stop it in water,the oil that is in the oceanharms the fish   sorry if you   have been waiting long  

it makes your voice or whatever you are doing with it and makes it louder. doing this makes people pay attention to you and makes them hear what you say therefore they have a better chance of following you or listening to you. therfore establishing dominance.