I believe the answer is B. BC/EF is in the same placement as well as the other letters in the answer.
Answer:
Fecal contamination can arise from sources such as combined sewer overflows, leaking septic tanks, sewer malfunctions, contaminated storm drains, animal feedlots, and other sources. ... coli may be washed into creeks, rivers, streams, lakes, or ground water
Explanation:
Answer: C) Is accepted as true until proven false
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Explanation:
We cannot prove the hypothesis to be 100% true because there might be data out there that we haven't accounted for, or some scenario that we haven't thought of yet. There's always going to be room for uncertainty and doubt. Keep in mind that such doubt does not necessarily mean that the theory is automatically false.
So all of this rules out choice A.
Choice B is ruled out as well because data supporting a hypothesis doesn't falsify the hypothesis. The term "falsify" means "to prove false" as you'd expect.
Choice C is the answer because the data seems to support the hypothesis and again we leave room for error. It's quite possible that in some unspecified date in the future, there are better methods of measurement to get a better sense of what's going on.
Choice D is ruled out because a law refers to something like the law of gravity. It's something you observe but it doesn't explain why something works. It doesn't provide the underlying mechanics of what's going on. We simply just report what we see which is exactly what an observation is.
Unlike the other species, the humans were able to use their superior brain power in order to construct sophisticated tools. These tools were able to perform tasks that were not possible by only using what nature provided as strengths. This gave a huge advantage for the humans, as by using the tools they were able to transform the environment as it suited them, thus controlling it. This was not achieved individually though, but instead the humans have developed complex social structure, so they were cooperating for the common good. Working together in large groups, and having technology on their side, the humans propelled themselves on top, becoming the biggest force among the living organisms.
