Which of the following is a dependent clause?
a. while we were eating dinner.
b. after the disruption, we left.
c. we saw a group of people laughing.
d. people wearing tinfoil hats crowded the street.

answer; ok in rural area most people depend on private transportation(cars),pick up truck,donkey and buggy: ),and urban people can walk or ride public transportation,bus,train cab,uber.

"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.