One major part of the opportunity costs of one's decision to go to college after high-school graduation is the

The opportunity cost that a person could have when they decided to go to college after high school graduation is the opportunity to have a good and full time job after graduation from college. Also a higher salary will be possible upon graduating from college. Opportunity cost means the benefit a person will received upon giving up another thing. 

c- companies fail to take environmental protection into account. i think

this headline suggests that midterm congressional   elections are at the corner and trump administration wants to activate his base by vowing to clamp down on immigrants and immigration as trump had said during his election campaign around two years ago. when a baby is born in usa, the baby becomes citizen of usa for 85 years and trump wants to end this rule of birthright citizenship to control illegal immigration and this what he said in an interview""we’re the only country in the world where a person comes in and has a baby, and the baby is essentially a citizen of the united states for 85 years, with all of those benefits,” "