How can you be sure a piece of material is fake news? A. Determine if the source is presenting information objectively. B. Skim the piece for grammatical errors. C. Evaluate the quality of the site’s images and navigation. D. Determine whether or not you agree with the central argument.

Option B

Explanation:

I will probably be skimming the materials for grammatical errors, most fake materials have 80% grammatical errors ,spellings and punctuations are always wrong, definitions of words are wrong and they don't give literary meanings. This materials are always made in a hurry and they usually have grammatical errors.

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.