Why is specialization a common result of free trade? O A. Worker safety agreements encourage production that uses skilled
labor.
B. Loss of import tax revenues forces countries to limit what they
manufacture.
C. Trade agreements determine what each country must produce.
O D. Competition encourages countries to specialize in what they do
best.

Does the threat of global warming require international cooperation? why or why not?

Which factors add to the greenhouse effect and are caused by human activities?

Alaina wants to decide whether her current cell phone plan is better than a package that another company offers. to compare the two plans, she plotted two lines on a graph, where y represented the total cost of one month’s service and x represented the megabytes of data that she used in a month. which part of the graph will represent the cost per megabyte of data used in each plan?