According to the article, what adaptation have trucking companies made in japan?

a. trucks are very narrow, making it easier to navigate crowded city streets.
b. onboard gps systems cut down travel time by routing trucks around traffic jams. c. special engines that create less pollution have been installed in trucks.
d. all transportation of goods within the country is done by rail.

I think it is A. because it modifies the truck.

what terms are there?

two jet streams that directly affect the formation of weather in the continental part are a polar jet and a subtropical jet. they are responsible for the transportation of weather systems, which directly affect people. the polar front is the boundary between cold air from the north pole and warmer equatorial air. both the polar jet and the subtropical jet blow from the west to the east, and follow the boundary between cold and warm air.

the strongest jet streams are polar jets, while subtropical jets are somewhat weaker.

the right answer is c. the polar jet stream is generaly stronger than the subtropical jet stream.