Which is the most credible source for a biographical essay on the deeds of Joan of Arc? a book about Joan of Arc published in 1980
a .net website about Joan of Arc that does not list an author
a wiki site on Joan of Arc's political role, updated in 2019
a 2019 encyclopedia article on Joan of Arc's military role

A

Explanation:

you so !

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.