In looking for a job, it's not what you know, but it's also not "who you know." Rather, the key may be who people that you know. This is the essence of the sociological insight first expressed in a research paper entitled:

The correct answer is "The Strength of Weak Ties"

In the networks of Strong Ties there is a common identity, and there we seek  references for decision making (relationships with a high level of credibility and influence);  Weak Ties networks are important because they connect us with various groups, breaking  the configuration of clusters, and functioning as bridges through which innovations circulate.  The Internet connects more often and sometimes more intensely, the relationships of Ties  Weak and Strong Ties, preserving and expanding Granovetter's concepts.

the historians cited in the article all agree with one another about the cause of the civil war. despite coming from different backgrounds and cultures, the historians agree that slavery was the root cause of the civil war. the fact that all these historiansgenerally agree with one another makes their shared viewpoints more reliable and valid, especially because the historians have different backgrounds and all work for the well-respected institutions of howard university, clemson university, and the university of colorado.

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.