Customs unions differ from free trade areas by the manner in which a. countries attain membership. b. the wto adjudicates disputes between the members. c. members share the gains from trade with each other. d. member countries apply tariffs to nonmembers.

Customs unions differ from free trade areas by the manner in member countries apply tariffs to non-members.

Option D

Explanation:

"Custom unions and free trade areas" are very similar to each other in terms of arrangements of internal manner in which the member nations agree to trade among themselves. In the both custom unions and free trade the members help each other lower the hindrances to trade such as taxes, tariffs, and many more, hence creating less competition in the market. The main point of difference between custom union and free trade is how their approach towards non treaty nations is. In custom unions, the members are required to establish external tariffs where as in free trade, as the name suggests, members are free to trade and do not require any tariff.

d. i assume the underlined word is "role." reformat if it isn't.

explanation:

role is closest to part because when replacing words, "playing a vital decision," "playing a vital activity," and "playing a vital dollar" don't make logical sense. the only meaningful choice is "playing a vital part."

this fits one of merriam-webster's definitions of role: "a function or part performed especially in a particular operation or process."

there are indirect ways of affecting state laws   by with holding funding's. and that's why we have a 55mph speed on the high way with a design of 70mph speed.