The following text discusses network theory.
Scale-free networks exhibit power-law degree distributions: most nodes have few connections while a few hubs have enormous numbers. This structure appears in phenomena ranging from the internet to metabolic pathways to social networks. Such networks display remarkable resilience to random failure but vulnerability to targeted attacks on hubs. The mathematical properties have implications for everything from disease spread to infrastructure design.
Which choice best describes the function of the last sentence?
It introduces mathematical equations for network analysis.
It suggests the broad applicability of the concepts discussed.
It contradicts the earlier description of network properties.
It provides a definition of scale-free networks.
Correct Answer: B
Choice B is the best answer. The last sentence notes "implications for everything from disease spread to infrastructure"—broad applicability.
- Evidence: The sentence states: "The mathematical properties have implications for everything from disease spread to infrastructure design."
- Reasoning: It shows that the specific math applies to many different fields.
- Conclusion: The function is to suggest broad applicability.
💡 Strategy: Look for "implications for everything from A to B."
Choice A is incorrect because equations aren't provided. Choice C is incorrect because it extends rather than contradicts. Choice D is incorrect because the definition appears earlier.