The malbec grape, originally grown in france, has become the main varietal in argentina. this is surprising because most malbec grown in argentina is grown at high altitudes, whereas the malbec grape once was grown at low altitudes. therefore, argentinian winegrowers should grow the malbec grape at low elevations.
which of the following, if true, would most weaken the conclusion of the argument? a) the bordeaux grape is the most popular grape in france but is rarely, if ever, grown in argentina. b) some varietals are unable to grow at high altitudes. c) the soil at high altitudes is filled with nutrients that many of argentina’s varietals flourish. d) the malbec vine is susceptible to phylloxera, a plant louse that only grows at low altitudes. e) malbec has recently enjoyed a surge in popularity, and can be found in many different countries.

i think you really need to revive you answer! : d

because he is that the right

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.

chronological thinking is an indispensable tool to structure a historical narrative and to give meaning to a sequence of events. the final section presents the results of a survey to test the chronological thinking of lower secondary school students carried out by the educational research institute.