Explanation for Question 43 From the Reading Section on the 2019 April Sat
For 43, we want to know which choice provides the best support for the 2 claim that the impact hypothesis is not the only possible explanation for the sudden 3 change in arts climate. So let's just go down the line and see which 4 one supports that claim. So starting off with a lines eight through 12, 5 that is this sentence right here. 6 So the team argues that his idea explains multiple observations, 7 not only the climate cooling and the disappearance of the Clovis hunters, 8 but also the near simultaneous extinction of the continents, 9 large mammals. So although it mentions climate cooling, 10 it's not giving another explanation as to why it happens. 11 So a is not going to be correct. 12 So now B is lines 15 through 17. 13 So let's go to those lines. 14 That is this sentence here. 15 A change in ocean circulation is generally thought to have brought about the onset 16 of the millennium long cooling, which is known as the younger Dryas. 17 So this one does give another reason a change in ocean circulation. 18 So B I'm going to mark as a correct answer, 19 and we are going to double check that C and D are incorrect. 20 So C is lines 23 through 26. 21 That is this sentence. 22 The new evidence comes in the form of geochemical analysis of sedimentary layers 23 at 25 archeological sites across north America, 24 nine of them Clovis. So not giving another explanation 25 for the sudden change of Earth's climate C is incorrect 26 and now D lines 26 through 28. 27 That is the sentence right after. 28 So certain features of the layers say the team suggest that they contain debris 29 formed by an extra terrestrial impact. 30 Again, not mention anything about why the Earth's climate 31 change changes that isn't the impact hypothesis. 32 So we can be confident in our answer of B.